Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 28
Filtrar
Más filtros

Bases de datos
País/Región como asunto
Tipo del documento
País de afiliación
Intervalo de año de publicación
1.
Public Health Nutr ; 22(18): 3385-3394, 2019 12.
Artículo en Inglés | MEDLINE | ID: mdl-31131783

RESUMEN

OBJECTIVE: Dietary quality (DQ), as assessed by the Alternative Healthy Eating Index for Pregnancy (AHEI-P), and conception and pregnancy outcomes were evaluated. DESIGN: In this prospective cohort study on couples planning their first pregnancy. Cox proportional hazards regression assessed the relationship between AHEI-P score and clinical pregnancy, live birth and pregnancy loss. SETTING: Participants were recruited from the Northeast region of the USA.Participants: Healthy, nulliparous couples (females, n 132; males, n 131; one male did not enrol). RESULTS: There were eighty clinical pregnancies, of which sixty-nine resulted in live births and eleven were pregnancy losses. Mean (sd) female AHEI-P was 71·0 (13·7). Of those who achieved pregnancy, those in the highest tertile of AHEI-P had the greatest proportion of clinical pregnancies; however, this association was not statistically significant (P = 0·41). When the time it took to conceive was considered, females with the highest AHEI-P scores were 20 % and 14 % more likely to achieve clinical pregnancy (model 1: hazard ratio (HR) = 1·20; 95 % CI 0·66, 2·17) and live birth (model 1: HR = 1·14; 95 % CI 0·59, 2·20), respectively. Likelihood of achieving clinical pregnancy and live birth increased when the fully adjusted model, including male AHEI-P score, was examined (clinical pregnancy model 4: HR = 1·55; 95 % CI 0·71, 3·39; live birth model 4: HR = 1·36; 95 % CI 0·59, 3·13). CONCLUSIONS: The present study is the first to examine AHEI-P score and achievement of clinical pregnancy. DQ was not significantly related to pregnancy outcomes, even after adjustments for covariates.


Asunto(s)
Dieta , Promoción de la Salud/métodos , Embarazo/estadística & datos numéricos , Dieta/normas , Dieta/estadística & datos numéricos , Femenino , Humanos , Masculino , New England , Valor Nutritivo/fisiología , Resultado del Embarazo , Atención Prenatal , Estudios Prospectivos , Adulto Joven
2.
J Obstet Gynaecol ; 37(8): 1009-1014, 2017 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-28635352

RESUMEN

The aim of this study was to determine if the use of a self-retaining, symmetrical retractor (OB/Mobius®) during caesarean delivery is associated with differences in post-operative pain experience. Consenting women undergoing caesarean delivery were randomly assigned to OB/Mobius® versus conventional retraction instruments. Women were blinded to retractor type and filled out surgical pain surveys each post-operative day. Additional outcome variables were collected through a provider survey and chart review. Of the 154 randomised women, 144 completed the study. There was no difference in the symmetry, quality or intensity of postoperative pain based on the method of retraction. The OB/Mobius® retractor did not confer an improvement in the quality or intensity of post-caesarean discomfort in the first three days following delivery. Nor did the groups differ in operative times, blood loss or pain medication usage. However, the retractor may offer improved visualisation and retraction in obese women. Impact statement Use of a plastic sheath self-retaining retractor has been minimally studied in caesarean deliveries. Recently it was found that the use of such a retractor reduced wound infection, but another study in obese women did not show improved rates of infection (Hinkson et al. 2016 ; Scolari Childress et al. 2016 ). The study of sheath self-retaining retractors to decrease post-operative pain has not been reported previously. This study offers an investigation into a generalisable population of parturients who undergo caesarean delivery and if the primary use of a self-retaining retractor versus sole use of traditional hand-held retractors decreased post-operative pain while in the hospital. Although this study did not show an improvement in post-operative pain, provider experience reports demonstrated some improvement in visualisation, particularly in the obese population with the use of this novel retractor, thus making it an option for providers who do caesarean deliveries without an assistant and find hand-held retractors inadequate.


Asunto(s)
Cesárea/instrumentación , Dolor Postoperatorio , Adulto , Analgésicos/administración & dosificación , Pérdida de Sangre Quirúrgica/estadística & datos numéricos , Índice de Masa Corporal , Cesárea/métodos , Femenino , Humanos , Tiempo de Internación/estadística & datos numéricos , Tempo Operativo , Dolor Postoperatorio/epidemiología , Dolor Postoperatorio/prevención & control , Embarazo
3.
Fertil Steril ; 117(1): 193-201, 2022 01.
Artículo en Inglés | MEDLINE | ID: mdl-34620454

RESUMEN

OBJECTIVE: To evaluate long-term reproductive outcomes in couples who were enrolled in a large randomized controlled trial that studied optimal treatment for unexplained infertility. DESIGN: Telephone survey, administered between March 2019 and February 2020. SETTING: Large urban university-affiliated fertility center. PATIENT(S): Couples who enrolled in the Fast Track and Standard Treatment Trial (FASTT). INTERVENTION(S): None. MAIN OUTCOMES MEASURE(S): Number of live births, methods of conception, adoption, and satisfaction regarding family size. RESULT(S): Of the 503 couples enrolled in FASTT, 311 (61.8%) were contacted and 286 (56.9%) consented to participate. The mean age and follicle-stimulating hormone level at the time of enrollment in FASTT were 33.1 ± 3.2 years and 6.8 ± 2.2 mIU/mL, respectively, for those who participated in this study. The mean age at follow-up was 49.5 ± 3.4 years. Of the 286 women, 194 (67.8%) had a live birth during the trial and 225 (78.7%) continued to try to conceive after FASTT. Of those who tried to conceive without treatment, 101 of 157 (64.3%) had a successful live birth, whereas 12 (5.3%) women had a live birth via intrauterine insemination and 82 (36.4%) via autologous oocyte in vitro fertilization. Overall, 182 (80.9%) women achieved a live birth after FASTT. CONCLUSION(S): The majority of couples were able to achieve a live birth after FASTT. Only 19 (6.6%) never achieved a live birth during their reproductive years. Moving to treatment sooner allows the opportunity to achieve >1 live birth, which is associated with increased satisfaction regarding family size. This further supports access to care and insurance coverage for infertility treatment.


Asunto(s)
Infertilidad/epidemiología , Infertilidad/terapia , Técnicas Reproductivas Asistidas/estadística & datos numéricos , Adulto , Niño , Preescolar , Ensayos Clínicos como Asunto , Composición Familiar , Femenino , Estudios de Seguimiento , Humanos , Lactante , Recién Nacido , Nacimiento Vivo , Masculino , Massachusetts/epidemiología , Persona de Mediana Edad , Satisfacción del Paciente/estadística & datos numéricos , Embarazo , Índice de Embarazo , Encuestas y Cuestionarios , Resultado del Tratamiento , Adulto Joven
4.
Curr Dev Nutr ; 5(5): nzab075, 2021 May.
Artículo en Inglés | MEDLINE | ID: mdl-34084994

RESUMEN

BACKGROUND: Diet is a modifiable lifestyle factor linked with fertility in a growing number of studies. OBJECTIVE: The objective of this study was to evaluate the association between dietary energy density (ED), a summary measure of diet quality that estimates the amount of energy per unit food (kcal/g) consumed, and conception and pregnancy outcomes. METHODS: A prospective cohort study of couples planning their first pregnancy was conducted in the Northeast region of the USA. Dietary data were collected prior to conception via 3 unannounced interviewer-administered 24-h dietary recalls. Multivariable-adjusted logistic regression (ORs and Cox proportional hazards models [RR] and 95% CIs) were estimated for continuous and categorical (tertile [T]) variables of dietary ED. RESULTS: The majority of women (n = 80; 61%) achieved clinical pregnancy. Median time to conception of a clincal pregnancy(TTC) for those who conceived was 4.64 mo with an IQR of 4.37 mo. ED modeled as a continuous variable was not associated with clinical pregnancy, live birth, or TTC after controlling for race, physical activity, and male partner's ED. When ED was categorized to consider nonlinear associations, 60%, 73%, and 50% of the participants in the tertiles (from lowest ED to highest) achieved clinical pregnancy. In multivariable logistic analyses with the middle group as the referent (ED = 1.37-1.60), membership in the highest ED group (ED >1.60) was associated with lower odds of clinical pregnancy (OR = 0.30; 95% CI: 0.11, 0.81, P = 0.02). In Cox proportional hazards analyses, membership in the highest ED group was associated with significantly longer TTC compared with the middle category (HR = 0.41; 95% CI: 0.21,0.82, P = 0.01). CONCLUSIONS: These results suggest that high dietary ED is associated with reduced fertility.This study evaluated associations between dietary energy density and the probability of conceiving clinical pregnancy, having a live birth, and the time to conception among couples planning pregnancy.

5.
Curr Opin Obstet Gynecol ; 21(3): 219-22, 2009 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-19469044

RESUMEN

PURPOSE OF REVIEW: To review the role of oxidative stress in the context of female fertility. RECENT FINDINGS: Oxidative stress is associated with decreased female fertility in animal and in-vitro models, but no studies to date have directly assessed the relationship in women. Exposures associated with oxidative stress and with evidence to influence the timing and maintenance of a viable pregnancy include pregnancy complications (e.g. preeclampsia), extremes of body weight, alcohol, tobacco, and caffeine intake. Intake of antioxidant nutrients, including use of multivitamins, impacts the generation of reactive oxygen species and may play a beneficial role in female fertility. SUMMARY: Infertility is a significant public health problem and diagnosis and treatment are stressful, invasive, and costly. The role of oxidative stress in female fertility is an understudied and compelling area for investigation. Identifying modifiable factors to decrease oxidative stress in the gynecologic environment may be an inexpensive and noninvasive therapy for increasing fertility.


Asunto(s)
Infertilidad Femenina/fisiopatología , Estrés Oxidativo/fisiología , Aborto Habitual/fisiopatología , Aborto Habitual/prevención & control , Antioxidantes/uso terapéutico , Femenino , Humanos , Infertilidad Femenina/tratamiento farmacológico , Preeclampsia/tratamiento farmacológico , Preeclampsia/fisiopatología , Embarazo
6.
Int J Gynaecol Obstet ; 102(2): 120-3, 2008 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-18501908

RESUMEN

OBJECTIVE: To evaluate preoperative abdominal leak point pressures (ALPP) with pre- and postoperative Incontinence Severity Index (ISI) scores. METHODS: A review of women who underwent a midurethral sling procedure between August 2004 and April 2006 was conducted. Eligible women completed preoperative urodynamic testing with ALPP determination and subjective incontinence severity assessment using the ISI before and 6 weeks after surgery. The ISI and ALPP relationship was analyzed using a Spearman rank correlation (Rho). RESULTS: Ninety-nine women met the inclusion criteria. Mean ALPP was 77.7 (25-172 cm H2O). Mean improvement in ISI following surgery was 4 (-8 to 12). ALPP correlated with preoperative ISI (Spearman Rho -0.28, P=0.01), preoperative leakage frequency (ISI question 1) (Spearman Rho -0.32, P=0.001), and the ISI change 6 weeks postoperatively (ISI-delta) (Spearman Rho -0.23, P=0.002). CONCLUSION: ALPP is associated with subjective incontinence severity. Women with the lowest ALPP improved most following a midurethral sling procedure.


Asunto(s)
Incontinencia Urinaria de Esfuerzo/fisiopatología , Adulto , Anciano , Anciano de 80 o más Años , Femenino , Humanos , Persona de Mediana Edad , Estudios Retrospectivos , Índice de Severidad de la Enfermedad , Urodinámica
7.
Obstet Gynecol ; 132(2): 377-384, 2018 08.
Artículo en Inglés | MEDLINE | ID: mdl-29995726

RESUMEN

OBJECTIVE: To compare the occurrence of superficial surgical site infections in obese women using prophylactic negative pressure therapy with standard dressings after cesarean delivery. METHODS: We conducted a randomized controlled, nonblinded, two-center study of prophylactic negative pressure therapy compared with standard surgical dressings placed at the time of primary closure at cesarean delivery in obese women with body mass indexes (BMI) of 35 or higher (ie, class II and III obesity). Our primary outcome was occurrence of a superficial surgical site infection. We assumed a superficial surgical site infection occurrence rate of 20% and intended to recruit 400 women. However, after low enrollment of 166 women over 24 months, an interim analysis for futility was conducted and the decision was made to halt the study. RESULTS: Women were recruited between January 5, 2015, and January 7, 2017, from two sites. The mean BMI on admission was 44.9 (±8) for the prophylactic negative wound therapy group and 43.4 (±7) for the standard dressing group. There were no differences in the occurrence of observed superficial surgical site infections between women using prophylactic negative pressure wound therapy (12/80 [15%]) compared with women who received the standard dressing (8/81 [10%], P=.35, relative risk 1.52, 95% CI 0.66-3.52). There were no differences in the occurrence of composite wound complications between women using prophylactic negative pressure wound therapy (25/80 [31%]) compared with women who received the standard dressing (24/81 [30%], P=.87). CONCLUSION: In this randomized controlled trial that did not achieve full anticipated enrollment, we did not observe a decrease in superficial surgical site infections after cesarean delivery in obese women with the use of prophylactic negative pressure wound therapy. CLINICAL TRIAL REGISTRATION: ClinicalTrials.gov, NCT02390401.


Asunto(s)
Cesárea , Terapia de Presión Negativa para Heridas , Obesidad/complicaciones , Cuidados Posoperatorios/métodos , Infección de la Herida Quirúrgica/prevención & control , Adulto , Femenino , Estudios de Seguimiento , Humanos , Embarazo , Factores de Riesgo , Infección de la Herida Quirúrgica/epidemiología , Infección de la Herida Quirúrgica/etiología , Resultado del Tratamiento
8.
Obstet Gynecol ; 109(1): 48-55, 2007 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-17197587

RESUMEN

OBJECTIVE: To evaluate the effect of teamwork training on the occurrence of adverse outcomes and process of care in labor and delivery. METHODS: A cluster-randomized controlled trial was conducted at seven intervention and eight control hospitals. The intervention was a standardized teamwork training curriculum based on crew resource management that emphasized communication and team structure. The primary outcome was the proportion of deliveries at 20 weeks or more of gestation in which one or more adverse maternal or neonatal outcomes or both occurred (Adverse Outcome Index). Additional outcomes included 11 clinical process measures. RESULTS: A total of 1,307 personnel were trained and 28,536 deliveries analyzed. At baseline, there were no differences in demographic or delivery characteristics between the groups. The mean Adverse Outcome Index prevalence was similar in the control and intervention groups, both at baseline and after implementation of teamwork training (9.4% versus 9.0% and 7.2% versus 8.3%, respectively). The intracluster correlation coefficient was 0.015, with a resultant wide confidence interval for the difference in mean Adverse Outcome Index between groups (-5.6% to 3.2%). One process measure, the time from the decision to perform an immediate cesarean delivery to the incision, differed significantly after team training (33.3 minutes versus 21.2 minutes, P=.03). CONCLUSION: Training, as was conducted and implemented, did not transfer to a detectable impact in this study. The Adverse Outcome Index could be an important tool for comparing obstetric outcomes within and between institutions to help guide quality improvement. CLINICAL TRIAL REGISTRATION: (www.ClinicalTrials.gov), NCT00381056 LEVEL OF EVIDENCE: I.


Asunto(s)
Parto Obstétrico/efectos adversos , Capacitación en Servicio , Servicio de Ginecología y Obstetricia en Hospital/normas , Evaluación de Procesos y Resultados en Atención de Salud/métodos , Grupo de Atención al Paciente , Femenino , Humanos , Embarazo
9.
Fertil Steril ; 108(2): 302-311, 2017 08.
Artículo en Inglés | MEDLINE | ID: mdl-28629584

RESUMEN

OBJECTIVE: To evaluate the role of vitamin D intake and serum levels on conception of clinical pregnancy and live birth. DESIGN: Prospective cohort study. SETTING: Academic medical centers. PATIENT(S): Healthy, nulliparous women, age 18-39 years, and their male partners. INTERVENTION(S): None. MAIN OUTCOME MEASURE(S): Clinical pregnancy and live birth were compared between those who did or did not meet the vitamin D estimated average requirement (EAR) intake (10 µg/d) and with serum 25-hydroxyvitamin D (25(OH)D) considered at risk for inadequacy or deficiency (<50 nmol/L) or sufficient (≥50 nmol/L). RESULT(S): Among 132 women, 37.1% did not meet the vitamin D EAR and 13.9% had serum levels at risk for inadequacy or deficiency. Clinical pregnancies were significantly higher among women who met the vitamin D EAR (67.5% vs. 49.0%) and with sufficient serum 25(OH)D (64.3% vs. 38.9%) compared with those who did not. Live births were higher among those who met the vitamin D EAR (59.0% vs. 40.0%). The adjusted odds ratio (AOR) of conceiving a clinical pregnancy was significantly higher among those who met the EAR (AOR = 2.26; 95% confidence interval [CI], 1.05-4.86) and had sufficient serum 25(OH)D (AOR = 3.37; 95% CI, 1.06-10.70). The associations were not significant after controlling for selected nutrients and dietary quality. CONCLUSION(S): Women with vitamin D intake below EAR and serum 25(OH)D levels at risk for inadequacy or deficiency may be less likely to conceive and might benefit from increased vitamin D intake to achieve adequacy. CLINICAL TRIAL REGISTRATION NUMBER: NCT00642590.


Asunto(s)
Nacimiento Vivo/epidemiología , Complicaciones del Embarazo/dietoterapia , Complicaciones del Embarazo/epidemiología , Deficiencia de Vitamina D/dietoterapia , Deficiencia de Vitamina D/epidemiología , Vitamina D/administración & dosificación , Vitamina D/sangre , Administración Oral , Adolescente , Adulto , Distribución por Edad , Suplementos Dietéticos/estadística & datos numéricos , Femenino , Humanos , Embarazo/sangre , Embarazo/estadística & datos numéricos , Complicaciones del Embarazo/sangre , Índice de Embarazo , Estados Unidos/epidemiología , Deficiencia de Vitamina D/sangre , Adulto Joven
10.
Am J Clin Nutr ; 76(6): 1385-91, 2002 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-12450907

RESUMEN

BACKGROUND: The associations between homocysteine, B vitamin status, and pregnancy outcomes have not been examined prospectively. OBJECTIVE: We assessed the associations of preconception homocysteine and B vitamin status with preterm birth and birth of low-birth-weight (LBW) and small-for-gestational-age (SGA) infants in Chinese women. DESIGN: This was a case-control study of women aged 21-34 y. Preterm cases (n = 29) delivered living infants at <37 wk gestation; term controls (n = 405) delivered infants at > or =37 wk. LBW cases (n = 33) had infants weighing <2500 g; normal-birth-weight controls (n = 390) had infants weighing > or =2500 g. SGA cases (n = 65) had infants below the 10th percentile of weight-for-gestational-age; appropriate-for-gestational-age controls (n = 358) had infants above this cutoff. Nonfasting plasma concentrations of homocysteine, folate, and vitamins B-6 and B-12 were measured before conception. RESULTS: Elevated homocysteine (> or =12.4 micro mol/L) was associated with a nearly 4-fold higher risk of preterm birth (OR: 3.6; 95% CI: 1.3, 10.0; P < 0.05). The risk of preterm birth was 60% lower among women with vitamin B-12 > or =258 pmol/L than among vitamin B-12-deficient women (OR: 0.4; 95% CI: 0.2, 0.9; P < 0.05) and was 50% lower among women with vitamin B-6 > or =30 nmol/L than among vitamin B-6-deficient women (OR: 0.5; 95% CI: 0.2, 1.2; NS). Folate status was not associated with preterm birth, and homocysteine and B vitamin status were not associated with LBW or SGA status. CONCLUSIONS: Elevated homocysteine and suboptimal vitamin B-12 and B-6 status may increase the risk of preterm birth. These results need to be confirmed in larger prospective studies.


Asunto(s)
Homocisteína/sangre , Estado Nutricional , Trabajo de Parto Prematuro/epidemiología , Atención Preconceptiva , Resultado del Embarazo , Complejo Vitamínico B/sangre , Adulto , Índice de Masa Corporal , Peso Corporal , Estudios de Casos y Controles , China/epidemiología , Femenino , Ácido Fólico/sangre , Edad Gestacional , Humanos , Recién Nacido de Bajo Peso , Recién Nacido , Recien Nacido Prematuro , Recién Nacido Pequeño para la Edad Gestacional , Trabajo de Parto Prematuro/etiología , Embarazo , Estudios Prospectivos , Factores de Riesgo , Vitamina B 12/sangre , Vitamina B 6/sangre , Deficiencia de Vitamina B/complicaciones , Deficiencia de Vitamina B/epidemiología
11.
Radiat Res ; 160(6): 691-706, 2003 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-14640794

RESUMEN

Few opportunities exist to evaluate the carcinogenic effects of long-term internal exposure to alpha-particle-emitting radionuclides. Patients injected with Thorotrast (thorium-232) during radiographic procedures, beginning in the 1930s, provide one such valuable opportunity. We evaluated site-specific cancer incidence and mortality among an international cohort of 3,042 patients injected during cerebral angiography with either Thorotrast (n = 1,650) or a nonradioactive agent (n = 1,392) and who survived 2 or more years. Standardized incidence ratios (SIR) for Thorotrast and comparison patients (Denmark and Sweden) were estimated and relative risks (RR), adjusted for population, age and sex, were generated with multivariate statistical modeling. For U.S. patients, comparable procedures were used to estimate standardized mortality ratios (SMR) and RR, representing the first evaluation of long-term, site-specific cancer mortality in this group. Compared with nonexposed patients, significantly increased risks in Thorotrast patients were observed for all incident cancers combined (RR = 3.4, 95% CI 2.9-4.1, n = 480, Denmark and Sweden) and for cancer mortality (RR = 4.0, 95% CI 2.5-6.7, n = 114, U.S.). Approximately 335 incident cancers were above expectation, with large excesses seen for cancers of the liver, bile ducts and gallbladder (55% or 185 excess cancers) and leukemias other than CLL (8% or 26 excess cancers). The RR of all incident cancers increased with time since angiography (P < 0.001) and was threefold at 40 or more years; significant excesses (SIR = 4.0) persisted for 50 years. Increasing cumulative dose of radiation was associated with an increasing risk of all incident cancers taken together and with cancers of the liver, gallbladder, and peritoneum and other digestive sites; similar findings were observed for U.S. cancer mortality. A marginally significant dose response was observed for the incidence of pancreas cancer (P = 0.05) but not for lung cancer. Our study confirms the relationship between Thorotrast and increased cancer incidence at sites of Thorotrast deposition and suggests a possible association with pancreas cancer. After injection with >20 ml Thorotrast, the cumulative excess risk of cancer incidence remained elevated for up to 50 years and approached 97%. Caution is needed in interpreting the excess risks observed for site-specific cancers, however, because of the potential bias associated with the selection of cohort participants, noncomparability with respect to the internal or external comparison groups, and confounding by indication. Nonetheless, the substantial risks associated with liver cancer and leukemia indicate that unique and prolonged exposure to alpha-particle-emitting Thorotrast increased carcinogenic risks.


Asunto(s)
Angiografía Cerebral/efectos adversos , Neoplasias Inducidas por Radiación/epidemiología , Neoplasias/epidemiología , Dióxido de Torio/efectos adversos , Adulto , Anciano , Relación Dosis-Respuesta en la Radiación , Femenino , Neoplasias Gastrointestinales/epidemiología , Humanos , Incidencia , Neoplasias Hepáticas/epidemiología , Neoplasias Pulmonares/epidemiología , Masculino , Persona de Mediana Edad , Neoplasias/mortalidad , Neoplasias Inducidas por Radiación/mortalidad , Factores de Tiempo
12.
Obstet Gynecol ; 100(1): 107-13, 2002 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-12100811

RESUMEN

OBJECTIVE: To assess the association between preconception homocysteine and B vitamin status and risk of clinical spontaneous abortion in women from Anqing, China. METHODS: All women were aged 21-34 years, had never smoked, and were primigravid. Patients (n = 49) were women with a clinically recognized pregnancy who experienced a fetal death before 100 days' gestation. Controls (n = 409) were women who maintained a pregnancy that ended in a live birth. Homocysteine, folate, and vitamins B(6) and B(12) concentrations were measured in plasma obtained before conception. RESULTS: Mean vitamin B(6) concentration was lower in patients than in controls (34.0 versus 37.9 nmol/L, P =.04). In addition, the risk of spontaneous abortion tended to increase with decreasing plasma vitamin B(6) and folate concentration (P for trend =.06 and.07, respectively), although the significance of these trends was further reduced in logistic models that included age, body mass index, and both vitamins. The risk of spontaneous abortion was four-fold higher among women with suboptimal plasma concentrations of both folate and vitamin B(6) (folate less than or equal to 8.4 nmol/L and vitamin B(6) less than or equal to 49 nmol/L) than in those with higher plasma concentrations of both vitamins (odds ratio 4.1, 95% confidence interval 1.2, 14.4). Homocysteine and vitamin B(12) status were not associated with spontaneous abortion risk. CONCLUSION: Suboptimal preconception folate and vitamin B(6) status, especially when they occur together, may increase the risk of clinical spontaneous abortion. Additional prospective studies are needed to confirm these findings and to determine whether antenatal B vitamin supplementation reduces spontaneous abortion risk.


Asunto(s)
Aborto Espontáneo/epidemiología , Ácido Fólico/análisis , Vitamina B 6/análisis , Aborto Espontáneo/etiología , Adulto , Estudios de Casos y Controles , China/epidemiología , Estudios de Cohortes , Femenino , Fertilización , Deficiencia de Ácido Fólico/complicaciones , Deficiencia de Ácido Fólico/diagnóstico , Humanos , Incidencia , Atención Prenatal , Probabilidad , Valores de Referencia , Factores de Riesgo , Estadísticas no Paramétricas , Deficiencia de Vitamina B 6/complicaciones , Deficiencia de Vitamina B 6/diagnóstico
13.
Fertil Steril ; 101(3): 759-66, 2014 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-24355050

RESUMEN

OBJECTIVE: To determine whether increased antioxidant intake in women is associated with shorter time to pregnancy (TTP) among a cohort of couples being treated for unexplained infertility. DESIGN: Secondary data analysis of a randomized controlled trial. SETTING: Academic medical center associated with a private infertility center. PATIENTS: Females with unexplained infertility. INTERVENTIONS: None. MAIN OUTCOME MEASURE(S): The time it took to establish a pregnancy that led to a live birth. RESULT(S): Mean nutrient intake exceeded the estimated average requirement (EAR) for vitamins C and E. No differences in mean intake of any of the antioxidants were noted between women who delivered a live-born infant during the study period vs. those who did not. In multivariable models, intake of ß-carotene from dietary supplements was associated with shorter TTP among women with body mass index (BMI) ≥25 kg/m(2) (hazard ratio [HR] 1.29, 95% confidence interval [CI] 1.09-1.53) and women <35 y (HR 1.19, 95% CI 1.01-1.41). Intake of vitamin C from dietary supplements was associated with shorter TTP among women with BMI <25 kg/m(2) (HR 1.09, 95% CI 1.03-1.15) and women <35 y (HR 1.10, 95% CI 1.02-1.18). Intake of vitamin E from dietary supplements among women ≥35 y also was associated with shorter TTP (HR 1.07, 95% CI 1.01-1.13). CONCLUSION(S): Shorter TTP was observed among women with BMI <25 kg/m(2) with increasing vitamin C, women with BMI ≥25 kg/m(2) with increasing ß-carotene, women <35 y with increasing ß-carotene and vitamin C, and women ≥35 y with increasing vitamin E. CLINICAL TRIAL REGISTRATION NUMBER: NCT00260091.


Asunto(s)
Antioxidantes/administración & dosificación , Suplementos Dietéticos , Infertilidad Femenina/tratamiento farmacológico , Infertilidad Femenina/epidemiología , Nacimiento Vivo/epidemiología , Tiempo para Quedar Embarazada/efectos de los fármacos , Adulto , Estudios de Cohortes , Femenino , Humanos , Masculino , Persona de Mediana Edad , Embarazo , Estudios Prospectivos , Tiempo para Quedar Embarazada/fisiología , Resultado del Tratamiento , Adulto Joven
14.
Fertil Steril ; 102(5): 1331-1337.e1, 2014 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-25226857

RESUMEN

OBJECTIVE: To determine whether day 3 FSH and E2 levels at the upper limits of normal affect live-birth rates and treatment trajectory in a conventional versus "fast track" treatment program for IVF. DESIGN: Secondary analysis of two randomized controlled trials, FASTT and FORT-T. SETTING: Not applicable. PATIENT(S): Infertile women ages 21-42 years randomized to conventional or accelerated treatment with controlled ovarian hyperstimulation (COH)-IUI and/or IVF (n=603 patients contributing 2,717 total cycles). INTERVENTION(S): Patients were stratified according to basal FSH and E2: FSH<10 mIU/mL and E2<40 pg/mL (group 1A), FSH<10 mIU/mL and E2≥40 pg/mL (group 1B), FSH, 10-15 mIU/mL and E2<40 pg/mL (group 2A), and FSH, 10-15 mIU/mL and E2≥40 pg/mL (group 2B). MAIN OUTCOME MEASURE(S): Number of cancelled cycles, disenrollment for poor response, and cumulative live-birth rates per couple. RESULT(S): Women in groups 2A and 2B were more likely to have cancelled cycles and be disenrolled for poor response. While no live births occurred in group 2B during COH-IUI (0/19 couples, 0/58 cycles), IVF still afforded these patients a reasonable chance of success (6/18 couples, 6/40 cycles, 33.3% live-birth rate per couple). The specificity and positive predictive value of basal FSH of 10-15 mIU/mL and E2≥40 pg/mL for no live birth during COH-IUI treatment were both 100%. CONCLUSION(S): Women who initiated infertility treatment with FSH of 10-15 mIU/mL and E2≥40 pg/mL on day 3 testing were unlikely to achieve live birth after COH-IUI treatment.


Asunto(s)
Clomifeno/administración & dosificación , Fármacos para la Fertilidad Femenina/administración & dosificación , Gonadotropinas/administración & dosificación , Inseminación Artificial/estadística & datos numéricos , Nacimiento Vivo/epidemiología , Inducción de la Ovulación/estadística & datos numéricos , Adulto , Esquema de Medicación , Femenino , Humanos , Inseminación Artificial/métodos , Inducción de la Ovulación/métodos , Embarazo , Prevalencia , Factores de Riesgo , Resultado del Tratamiento , Estados Unidos/epidemiología , Adulto Joven
15.
Fertil Steril ; 101(6): 1574-81.e1-2, 2014 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-24796764

RESUMEN

OBJECTIVE: To determine the optimal infertility therapy for women at the end of their reproductive potential. DESIGN: Randomized clinical trial. SETTING: Academic medical centers and private infertility center in a state with mandated insurance coverage. PATIENT(S): Couples with ≥ 6 months of unexplained infertility; female partner aged 38-42 years. INTERVENTION(S): Randomized to treatment with two cycles of clomiphene citrate (CC) and intrauterine insemination (IUI), follicle stimulating hormone (FSH)/IUI, or immediate IVF, followed by IVF if not pregnant. MAIN OUTCOME MEASURE(S): Proportion with a clinically recognized pregnancy, number of treatment cycles, and time to conception after two treatment cycles and at the end of treatment. RESULT(S): We randomized 154 couples to receive CC/IUI (N = 51), FSH/IUI (N = 52), or immediate IVF (N = 51); 140 (90.9%) couples initiated treatment. The cumulative clinical pregnancy rates per couple after the first two cycles of CC/IUI, FSH/IUI, or immediate IVF were 21.6%, 17.3%, and 49.0%, respectively. After all treatments, 110 (71.4%) of 154 couples had conceived a clinically recognized pregnancy, and 46.1% had delivered at least one live-born baby; 84.2% of all live-born infants resulting from treatment were achieved via IVF. There were 36% fewer treatment cycles in the IVF arm compared with either COH/IUI arm, and the couples conceived a pregnancy leading to a live birth after fewer treatment cycles. CONCLUSION(S): A randomized controlled trial in older women with unexplained infertility to compare treatment initiated with two cycles of controlled ovarian hyperstimulation/IUI versus immediate IVF demonstrated superior pregnancy rates with fewer treatment cycles in the immediate IVF group. CLINICAL TRIAL REGISTRATION NUMBER: NCT00246506.


Asunto(s)
Fertilidad , Infertilidad Femenina/terapia , Infertilidad Masculina/terapia , Técnicas Reproductivas Asistidas , Adulto , Factores de Edad , Boston , Clomifeno/administración & dosificación , Terapia Combinada , Esquema de Medicación , Femenino , Fármacos para la Fertilidad Femenina/administración & dosificación , Fertilización In Vitro , Hormona Folículo Estimulante/administración & dosificación , Humanos , Infertilidad Femenina/diagnóstico , Infertilidad Femenina/fisiopatología , Infertilidad Masculina/diagnóstico , Infertilidad Masculina/fisiopatología , Inseminación Artificial , Nacimiento Vivo , Masculino , Persona de Mediana Edad , Selección de Paciente , Embarazo , Índice de Embarazo , Factores de Riesgo , Factores de Tiempo , Tiempo para Quedar Embarazada , Resultado del Tratamiento
16.
Fertil Steril ; 97(4): 813-8, 2012 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-22463775

RESUMEN

Gonadotropin therapy has been a cornerstone of infertility therapy for half a century. From the very beginning, its use has been associated with a high rate of multiple births, particularly high order multiples, and ovarian hyperstimulation syndrome. Initially, success rates seemed acceptable when used for superovulation (SO)/IUI therapy. However, as data from RCTs have emerged, reported outcomes suggest that we question the use of injectible gonadotropins. This manuscript examines the studies that have challenged gonadotropin use for SO/IUI and other research that supports reduced doses of gonadotropins for IVF. We examine the challenges for its continued use for SO/IUI and for moving to lower doses worldwide for IVF. We propose a future that views gonadotropins as a relic of the twentieth century.


Asunto(s)
Fármacos para la Fertilidad Femenina/uso terapéutico , Gonadotropinas/uso terapéutico , Infertilidad/terapia , Inducción de la Ovulación , Femenino , Fármacos para la Fertilidad Femenina/efectos adversos , Fármacos para la Fertilidad Femenina/historia , Fertilización In Vitro , Gonadotropinas/efectos adversos , Gonadotropinas/historia , Historia del Siglo XX , Historia del Siglo XXI , Humanos , Infertilidad/historia , Infertilidad/fisiopatología , Inseminación Artificial , Progenie de Nacimiento Múltiple , Inducción de la Ovulación/efectos adversos , Inducción de la Ovulación/historia , Inducción de la Ovulación/tendencias , Embarazo , Embarazo Múltiple , Medición de Riesgo , Factores de Riesgo , Superovulación , Resultado del Tratamiento
17.
Fertil Steril ; 94(3): 888-99, 2010 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-19531445

RESUMEN

OBJECTIVE: To determine the value of gonadotropin/intrauterine insemination (FSH/IUI) therapy for infertile women aged 21-39 years. DESIGN: Randomized controlled trial. SETTING: Academic medical center associated with a private infertility center. PATIENT(S): Couples with unexplained infertility. INTERVENTION(S): Couples were randomized to receive either conventional treatment (n=247) with three cycles of clomiphene citrate (CC)/IUI, three cycles of FSH/IUI, and up to six cycles of IVF or an accelerated treatment (n=256) that omitted the three cycles of FSH/IUI. MAIN OUTCOME MEASURE(S): The time it took to establish a pregnancy that led to a live birth and cost-effectiveness, defined as the ratio of the sum of all health insurance charges between randomization and delivery divided by the number of couples delivering at least one live-born baby. RESULT(S): An increased rate of pregnancy was observed in the accelerated arm (hazard ratio [HR], 1.25; 95% confidence interval [CI], 1.00-1.56) compared with the conventional arm. Median time to pregnancy was 8 and 11 months in the accelerated and conventional arms, respectively. Per cycle pregnancy rates for CC/IUI, FSH/IUI, and IVF were 7.6%, 9.8%, and 30.7%, respectively. Average charges per delivery were $9,800 lower (95% CI, $25,100 lower to $3,900 higher) in the accelerated arm compared to conventional treatment. The observed incremental difference was a savings of $2,624 per couple for accelerated treatment and 0.06 more deliveries. CONCLUSION(S): A randomized clinical trial demonstrated that FSH/IUI treatment was of no added value.


Asunto(s)
Infertilidad/terapia , Técnicas Reproductivas Asistidas , Adulto , Calibración , Protocolos Clínicos/normas , Clomifeno/uso terapéutico , Femenino , Fármacos para la Fertilidad Femenina/uso terapéutico , Gonadotropinas/uso terapéutico , Costos de la Atención en Salud , Humanos , Infertilidad/economía , Masculino , Inducción de la Ovulación , Embarazo , Índice de Embarazo , Técnicas Reproductivas Asistidas/economía , Técnicas Reproductivas Asistidas/normas , Factores de Tiempo , Adulto Joven
19.
Fertil Steril ; 91(3): 767-76, 2009 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-18321489

RESUMEN

OBJECTIVE: To determine the optimal number of day 3 embryos to transfer in women >or=38 years by conducting an evidence-based evaluation. DESIGN: Retrospective analysis of 2000-2004 national SART data. SETTING: National writing group. PATIENT(S): A total of 36,103 day 3 embryo transfers in women >or=38 years undergoing their first assisted reproductive technology cycle. INTERVENTION(S): None. MAIN OUTCOME MEASURE(S): Logistic regression was used to model the probability of pregnancy, delivery, and multiple births (twin or high order) based on age- and cycle-specific parameters. RESULT(S): Pregnancy rates, delivery rates, and multiple rates increased up to transfer of three embryos in 38-year-olds and four in 39-year-olds; beyond this number, only multiple rates increased. In women >or=40 years, delivery rates and multiple rates climbed steadily with increasing numbers transferred. Multivariate analysis confirmed the statistically significant effect of age, number of oocytes retrieved, and embryo cryopreservation on delivery and multiple rates. Maximum FSH level was not an independent predictor by multivariate analysis. Use of intracytoplasmic sperm injection was associated with lowered delivery rate. CONCLUSION(S): No more than three or four embryos should be transferred in 38- and 39-year-olds, respectively, whereas up to five embryos could be transferred in >or=40-year-olds. Numbers of embryos to transfer should be adjusted according to number of oocytes retrieved and availability of excess embryos for cryopreservation.


Asunto(s)
Fase de Segmentación del Huevo , Transferencia de Embrión , Adulto , Factores de Edad , Algoritmos , Criopreservación , Bases de Datos como Asunto , Técnicas de Cultivo de Embriones , Medicina Basada en la Evidencia , Femenino , Hormona Folículo Estimulante Humana/sangre , Humanos , Nacimiento Vivo , Modelos Logísticos , Progenie de Nacimiento Múltiple , Recuperación del Oocito , Embarazo , Índice de Embarazo , Estudios Retrospectivos , Sociedades Médicas , Inyecciones de Esperma Intracitoplasmáticas , Factores de Tiempo , Resultado del Tratamiento
20.
Fertil Steril ; 91(1): 157-66, 2009 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-18222441

RESUMEN

OBJECTIVE: To develop evidence-based recommendations for the optimum numbers of blastocyst stage embryos to transfer in women >or=38 years old. DESIGN: Retrospective analysis of national Society for Assisted Reproductive Technology data from 2000 to 2004. SETTING: National writing group. PATIENT(S): Five thousand five hundred sixty-nine day 5 and day 6 ETs in women >or=38 years of age undergoing their first assisted reproductive technology cycle. INTERVENTION(S): None. MAIN OUTCOME MEASURE(S): Logistic regression was used to model the probability of a delivery, twins, and high-order multiples based on patient characteristics. RESULT(S): In 38- and 39-year-old women there was an increase in delivery rates up to transfer of two embryos. Beyond that, number transferred increased multiple rates but not delivery rates. Transfer of three embryos in 40-year-old women increased delivery but not multiple rate. For 41- to 42-year-olds delivery rate was level after transfer of three, but twin rate continued to increase. Multivariate analysis showed that age, embryo cryopreservation, and use of intracytoplasmic sperm injection influence delivery rate. Increasing numbers of oocytes retrieved showed a trend but was not an independent predictor. CONCLUSION(S): Optimal numbers of blastocyst stage embryos to transfer in first cycles for women 38 to 39 years old differ from those in women >or=40 years. Number transferred should be modified as determined by a model that includes availability of excess embryos to cryopreserve, use of intracytoplasmic sperm injection, and, possibly, number of oocytes retrieved.


Asunto(s)
Blastocisto/fisiología , Transferencia de Embrión/métodos , Fertilización In Vitro/métodos , Fertilización In Vitro/estadística & datos numéricos , Adulto , Envejecimiento , Bases de Datos Factuales , Parto Obstétrico/estadística & datos numéricos , Implantación del Embrión/fisiología , Desarrollo Embrionario/fisiología , Femenino , Humanos , Infertilidad Masculina/epidemiología , Masculino , Embarazo , Análisis de Regresión , Técnicas Reproductivas Asistidas/estadística & datos numéricos , Estudios Retrospectivos , Gemelos , Estados Unidos
SELECCIÓN DE REFERENCIAS
DETALLE DE LA BÚSQUEDA