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1.
J Womens Health (Larchmt) ; 33(8): 1095-1101, 2024 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-38578025

RESUMO

Objective: Our goal was to assess the fertility knowledge and educational experiences of graduating U.S. medical students to evaluate areas of improvement for future educational interventions. Design: Web-based cross-sectional survey. Subjects: Medical students graduating in 2023 from the University of Miami Miller School of Medicine (SOM), New York University (NYU) Grossman SOM, Wayne State University SOM, Perelman SOM at the University of Pennsylvania, and Mayo Clinic Alix SOM. Main Outcome Measures: Fertility-related knowledge and educational experiences of U.S. medical students in their final year of school. Results: In total, 117 students (14.4%) completed the survey. The average knowledge score was 78%. Twenty-three (22%) overestimated the age of most precipitous fertility decline, and 50 (52%) overestimated the chance of getting pregnant for a 40-year-old person with ovaries. One-third of students (30, 32%) incorrectly believe that physicians have equivalent infertility rates to the general population. Students were less cognizant of male fertility issues, incorrectly believing there was no negative impact on male fertility by age (43, 42%) among other factors. Seventy-five (81%) reported less than 5 hours of fertility-related education in medical school. Only one-third (32%) were satisfied or very satisfied with the fertility education they received. In an open-response question, students expressed interest in additional education on transgender and cancer patient care, fertility preservation, assisted reproductive technologies, and reproductive life planning in medicine. Conclusions: There is a need and an opportunity for medical education programs to enhance fertility education. Giving students and trainees the knowledge required to make informed decisions for their family-building purposes and improving their ability to counsel patients adequately should be a goal of future educational endeavors. The data collected in this study will serve as a guide for the development of fertility-related learning modules for medical students and trainees.


Assuntos
Fertilidade , Conhecimentos, Atitudes e Prática em Saúde , Estudantes de Medicina , Humanos , Estudantes de Medicina/estatística & dados numéricos , Feminino , Masculino , Estudos Transversais , Adulto , Inquéritos e Questionários , Estados Unidos , Adulto Jovem , Infertilidade , Educação de Graduação em Medicina
2.
Fertil Steril ; 119(3): 355-363, 2023 03.
Artigo em Inglês | MEDLINE | ID: mdl-36682686

RESUMO

IMPORTANCE: Uterine fibroids and endometriosis are 2 of the leading causes of morbidity among reproductive-aged women. There are significant racial disparities in disease prevalence, incidence, age of onset, and treatment profile in fibroids. The data on endometriosis are less clear. OBJECTIVE: To conduct a systematic review of racial disparities in prevalence of uterine fibroids and endometriosis in the United States and summarize the literature on these 2 highly prevalent benign gynecologic conditions using a framework that explicitly incorporates and acknowledges the social, structural, and political contexts as a root cause of racial disparities between Black and White women. EVIDENCE REVIEW: A systematic review regarding racial disparities in prevalence of fibroids and endometriosis was conducted separately. Two separate searches were conducted in PubMed to identify relevant original research manuscripts and prior systematic reviews regarding racial disparities in uterine fibroids and endometriosis using standardized search terms. In addition, we conducted a structured literature search to provide social, structural, and political context of the disparities. FINDINGS: A systematic review of the literature indicated that the prevalence of uterine fibroids was consistently higher in Black than in White women with the magnitude of the difference varying depending on population and case definition. Prevalence of endometriosis varied considerably depending on the base population and case definition, but was the same or lower among Black vs. White women. As a result of the social, structural, and political context in the United States, Black women disproportionately experience a range of exposures across the life course that may contribute to their increased uterine fibroid incidence, prevalence, and severity of uterine fibroids. However, data suggest no racial difference in the incidence of endometriosis. Nevertheless, Black women with fibroids or endometriosis experience worse clinical and surgical outcomes than their White counterparts. CONCLUSION AND RELEVANCE: Racial disparities in uterine fibroids and endometriosis can be linked with differential exposures to suspected etiologic agents, lack of adequate access to health care, including highly skilled gynecologic surgeons, and bias and discrimination within the health care system. Eliminating these racial disparities will require solutions that address root causes of health disparities through policy, education and programs to ensure that all patients receive culturally- and structurally-competent care.


Assuntos
Endometriose , Disparidades nos Níveis de Saúde , Leiomioma , Adulto , Feminino , Humanos , Endometriose/diagnóstico , Endometriose/etnologia , Leiomioma/etnologia , Leiomioma/terapia , Prevalência , Grupos Raciais , Estados Unidos/epidemiologia , Negro ou Afro-Americano , Brancos
3.
J Clin Transl Sci ; 6(1): e40, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-35574152

RESUMO

Background: Although one of the fastest-growing populations in the USA, Latinx individuals remain underrepresented in research. In this study, we aimed to identify how Latina/Latinx participants of the Environment, Leiomyomas, Latinas, and Adiposity Study (ELLAS) learned about the research study and what motivated them to participate. Materials and Methods: Using a standardized survey tool, bilingual staff interviewed participants and asked them, 1) how they heard about ELLAS and 2) to identify and rank their top three reasons for participating in ELLAS. Results: "Word of mouth" through a friend or relative was the most common method of learning about ELLAS (49.0%), followed by a "community outreach event" (29.3%). The three most common reasons for participating in ELLAS were "to learn more about women's health" (83.3%), "to receive a free health assessment" (79.4%), and "to contribute to scientific knowledge" (59.5%). Correlation between demographic and socioeconomic characteristics and participant responses indicated that there are different reasons for participation based on these factors. Conclusions: Community engagement and word of mouth are vital to the successful recruitment of Latina/Latinx participants to research studies. Latinx participants are most motivated to participate by health benefits and health education, as well as altruistic aspects of research studies. Therefore, establishing mutually beneficial relationships within Latinx communities and appealing to motivations for research participation with close attention to the demographics of participants can both expand and allow for targeted recruitment efforts for this underrepresented group in research studies.

4.
Am J Obstet Gynecol ; 226(3): 392.e1-392.e12, 2022 03.
Artigo em Inglês | MEDLINE | ID: mdl-33974903

RESUMO

BACKGROUND: Uterine leiomyomas, commonly known as fibroids, are benign tumors in postmenarchal females. By the age of 35 years, approximately 30% of females will have fibroids, and by the age of 50 years, the prevalence approaches 70% with some studies reporting >85% prevalence in African American females. Previous studies evaluating the prevalence of fibroids have largely relied on self-reported fibroid diagnoses, which could have falsely underestimated prevalence because many females with fibroids are asymptomatic. Despite known differences in fibroid prevalence by race, there are very limited data on fibroid prevalence by ethnicity. The Latino population is the largest ethnic minority in the United States, yet there is no large study that utilizes ultrasound to confirm the presence of fibroids in Latina/Latinx females. In addition, fibroids have been associated with obesity and with diabetes mellitus, but the data have been inconsistent and at times conflicting. OBJECTIVE: The Environment, Leiomyomas, Latinas, and Adiposity Study was designed to quantify the prevalence of uterine fibroids among Latina/Latinx females and understand the relationships between obesity, glucose dysregulation, and fibroid prevalence and growth. This article presents the study's design and reports early enrollment data. STUDY DESIGN: The Environment, Leiomyomas, Latinas, and Adiposity Study is a 5-year longitudinal cohort study based in Southeast Michigan with the goal of recruiting 600 Latina/Latinx females between the ages of 21 and 50 years. Given the recruitment goals, developing a respectful, transparent, and trusting relationship between the study investigators and the community was a major priority. Thus, a community-engaged research approach was utilized in the design of the Environment, Leiomyomas, Latinas, and Adiposity Study. A community advisory board containing community leaders, largely from the Latinx community, provided input and direction during the entirety of the Environment, Leiomyomas, Latinas, and Adiposity Study design and rollout process. A minimum of 3 visits (orientation and consent, baseline, follow-up) will be conducted for each participant, with baseline and follow-up visits approximately 18 to 30 months apart. At each visit, interviewer and self-administered surveys will assess sociodemographic factors, health behaviors, health history, and social determinants of health. In addition, participants undergo a pelvic ultrasound examination and biologic samples are collected. RESULTS: Using community-engaged approaches, we have successfully enrolled 633 Latina/Latinx females. The mean participant age is 37.5±7.04 years. The mean body mass index is 30.0±6.54 kg/m2. First study visits have been initiated. CONCLUSION: The objective of the Environment, Leiomyomas, Latinas, and Adiposity Study is to address the knowledge gap regarding uterine fibroids in the Latina/Latinx population. The Environment, Leiomyomas, Latinas, and Adiposity Study will generate ultrasound-confirmed evidence of the prevalence and growth patterns of uterine fibroids in this specific population while also examining the associations between obesity and laboratory-confirmed glucose dysregulation with uterine fibroid prevalence and growth patterns.


Assuntos
Leiomioma , Neoplasias Uterinas , Adiposidade , Adulto , Etnicidade , Feminino , Hispânico ou Latino , Humanos , Leiomioma/epidemiologia , Estudos Longitudinais , Pessoa de Meia-Idade , Grupos Minoritários , Obesidade/epidemiologia , Neoplasias Uterinas/epidemiologia , Adulto Jovem
5.
J Acad Nutr Diet ; 120(5): 885-892, 2020 05.
Artigo em Inglês | MEDLINE | ID: mdl-31879178

RESUMO

BACKGROUND: Riboflavin, vitamin B-6, and vitamin B-12 are key players in one-carbon metabolism as enzymatic cofactors, and deficiency of these nutrients may influence reproductive outcomes possibly through affecting reproductive hormones. OBJECTIVE: The goal was to investigate associations between dietary intakes of riboflavin, vitamin B-6, and vitamin B-12, and menstrual function among premenopausal women. DESIGN: This was a secondary analysis of a prospective cohort study conducted at the University at Buffalo during 2005 to 2007. PARTICIPANTS/SETTING: Participants were 259 healthy, regularly menstruating women (aged 18 to 44 years) with self-reported menstrual cycles between 21 and 35 days, who were not trying to conceive, and who had not used hormonal contraception during the past 3 months. MAIN OUTCOME MEASURES: Intakes of B vitamins were assessed via 24-hour dietary recalls four times per menstrual cycle for two cycles. Serum reproductive hormones and plasma homocysteine were measured eight and three times, respectively, per cycle for two cycles. Anovulatory cycles were determined by progesterone concentrations ≤5 ng/mL (15.9 nmol/L) and no observed serum luteinizing hormone peak during the mid or late luteal phase visit. STATISTICAL ANALYSIS: Weighted linear mixed regressions were used to evaluate associations between cycle-averaged B vitamin intakes and hormones and homocysteine, and generalized linear regressions for associations with anovulation. Models were adjusted for age, race, body mass index, physical activity, alternate Mediterranean diet score, intakes of total energy, protein, fiber, and folate, and percentage of energy intake from fat. RESULTS: Higher intakes of riboflavin (per 0.1 mg increase in intake) were inversely correlated with estradiol (-0.87%, 95% CI -1.67 to -0.06) and homocysteine levels (-0.61%, 95% CI -1.10 to -0.12). Higher vitamin B-6 intakes were suggestive of higher follicle-stimulating hormone, although the results were not statistically significant (0.63% difference, 95% CI -0.03 to 1.29, per 0.1 mg increase in intake; P=0.06). Small increases in testosterone and decreases in homocysteine were found with vitamin B-12 intake. No associations were observed between intake of B vitamins and a risk of sporadic anovulation. CONCLUSIONS: Higher intakes of riboflavin were associated with a small decrease in serum estradiol among healthy, regularly menstruating women. Higher intakes of riboflavin and vitamin B-12 were associated with lower plasma homocysteine concentrations. Overall, riboflavin, vitamin B-6, and vitamin B-12 that are one-carbon nutrients do not appear to influence the ovarian cycle among premenopausal women.


Assuntos
Ciclo Menstrual/sangue , Pré-Menopausa/sangue , Riboflavina/análise , Vitamina B 12/análise , Vitamina B 6/análise , Adolescente , Adulto , Anovulação/sangue , Inquéritos sobre Dietas , Ingestão de Alimentos , Estradiol/sangue , Feminino , Hormônio Foliculoestimulante/sangue , Voluntários Saudáveis , Humanos , Hormônio Luteinizante/sangue , Progesterona/sangue , Estudos Prospectivos , Testosterona/sangue , Adulto Jovem
6.
Epidemiology ; 30 Suppl 2: S37-S46, 2019 11.
Artigo em Inglês | MEDLINE | ID: mdl-31569151

RESUMO

BACKGROUND: Although fatty acids are involved in critical reproductive processes, the relationship between specific fatty acids and fertility is uncertain. We investigated the relationship between preconception plasma fatty acids and pregnancy outcomes. METHODS: We included 1,228 women attempting pregnancy with one to two previous pregnancy losses from the EAGeR trial (2007-2011). Plasma fatty acids were measured at baseline. We used log-binomial regression to assess associations between fatty acids and pregnancy, pregnancy loss, and live birth, adjusting for age, race, smoking, BMI, physical activity, income, parity, treatment arm, and cholesterol. RESULTS: Although total saturated fatty acids (SFAs) were not associated with pregnancy outcomes, 14:0 (myristic acid; relative risk [RR] = 1.10, 95% confidence interval [CI] = 1.02, 1.19, per 0.1% increase) and 20:0 (arachidic acid; RR = 1.05, 95% CI = 1.01, 1.08, per 0.1% increase) were positively associated with live birth. Findings suggested a positive association between total monounsaturated fatty acids (MUFAs) and pregnancy and live birth and an inverse association with loss. Total polyunsaturated fatty acids (PUFAs) were associated with lower probability of pregnancy (RR = 0.97, 95% CI = 0.95, 1.00) and live birth (RR = 0.96, 95% CI = 0.94, 0.99), and increased risk of loss (RR = 1.10, 95% CI = 1.00, 1.20), per 1% increase. Trans fatty acids and n-3 fatty acids were not associated with pregnancy outcomes. CONCLUSIONS: Preconception total plasma MUFAs were positively associated with pregnancy and live birth. PUFAs were inversely associated with pregnancy outcomes. Specific SFAs were associated with a higher probability of live birth. Our results suggest that fatty acids may influence pregnancy outcomes.


Assuntos
Ácidos Graxos/sangue , Resultado da Gravidez/epidemiologia , Aborto Espontâneo/sangue , Aborto Espontâneo/epidemiologia , Adolescente , Adulto , Fatores Etários , Índice de Massa Corporal , Colesterol/sangue , Exercício Físico , Ácidos Graxos Monoinsaturados/sangue , Feminino , Humanos , Renda/estatística & dados numéricos , Nascido Vivo/epidemiologia , Paridade , Gravidez , Grupos Raciais/estatística & dados numéricos , Risco , Fumar/efeitos adversos , Adulto Jovem
7.
Br J Nutr ; 120(1): 81-89, 2018 07.
Artigo em Inglês | MEDLINE | ID: mdl-29673411

RESUMO

Although minerals are linked to several reproductive outcomes, it is unknown whether dietary minerals are associated with ovulatory function. We hypothesised that low intakes of minerals would be associated with an increased risk of anovulation. We investigated associations between dietary mineral intake and both reproductive hormones and anovulation in healthy women in the BioCycle Study, which prospectively followed up 259 regularly menstruating women aged 18-44 years who were not taking mineral supplements for two menstrual cycles. Intakes of ten selected minerals were assessed through 24-h dietary recalls at up to four times per cycle in each participant. Oestradiol, progesterone, luteinising hormone (LH), follicle-stimulating hormone (FSH), sex-hormone-binding globulin and testosterone were measured in serum up to eight times per cycle. We used weighted linear mixed models to evaluate associations between minerals and hormones and generalised linear models for risk of anovulation. Compared with Na intake ≥1500 mg, Na intake <1500 mg was associated with higher levels of FSH (21·3 %; 95 % CI 7·5, 36·9) and LH (36·8 %; 95 % CI 16·5, 60·5) and lower levels of progesterone (-36·9 %; 95 % CI -56·5, -8·5). Na intake <1500 mg (risk ratio (RR) 2·70; 95 % CI 1·00, 7·31) and Mn intake <1·8 mg (RR 2·00; 95 % CI 1·02, 3·94) were associated with an increased risk of anovulation, compared with higher intakes, respectively. Other measured dietary minerals were not associated with ovulatory function. As essential minerals are mostly obtained via diet, our results comparing insufficient levels with sufficient levels highlight the need for future research on dietary nutrients and their associations with ovulatory cycles.


Assuntos
Anovulação/sangue , Dieta , Hormônios/sangue , Ciclo Menstrual , Minerais/administração & dosagem , Adolescente , Adulto , Suplementos Nutricionais , Estradiol/sangue , Feminino , Hormônio Foliculoestimulante/sangue , Humanos , Hormônio Luteinizante/sangue , New York , Ovulação , Gravidez , Progesterona/sangue , Estudos Prospectivos , Reprodução , Risco , Globulina de Ligação a Hormônio Sexual/análise , Testosterona/sangue , Saúde da Mulher , Adulto Jovem
8.
Am J Obstet Gynecol ; 218(6): 608.e1-608.e6, 2018 06.
Artigo em Inglês | MEDLINE | ID: mdl-29548752

RESUMO

BACKGROUND: Prior studies have reported mixed results regarding relationships between vitamin D, androgens, and sex hormone-binding globulin in patients with polycystic ovary syndrome. However, less is known regarding these associations in eumenorrheic, premenopausal women. OBJECTIVE: Our objective was to study the relationships between serum vitamin D and androgen biomarkers in eumenorrheic women with a history of pregnancy loss who were attempting pregnancy. STUDY DESIGN: This was an analysis of a cohort of 1191 participants from the Effects of Aspirin in Gestation and Reproduction trial (2006-2012). Participants were attempting to conceive, aged 18-40 years, with 1-2 documented prior pregnancy losses and no history of infertility, and recruited from 4 academic medical centers in the United States. Serum vitamin D (25-hydroxyvitamin D) and hormone concentrations were measured at baseline. RESULTS: Vitamin D concentration was negatively associated with free androgen index (percentage change [95% confidence interval, -5% (-8% to -2%)] per 10 ng/mL increase) and positively associated with sex hormone-binding globulin (95% confidence interval, 4% [2-7%]), although not with total testosterone, free testosterone, or dehydroepiandrosterone sulfate after adjusting for age, body mass index, smoking status, race, income, education, physical activity, and season of blood draw. CONCLUSION: Overall, vitamin D was associated with sex hormone-binding globulin and free androgen index in eumenorrheic women with prior pregnancy loss, suggesting that vitamin D may play a role in the bioavailability of androgens in eumenorrheic women. We are limited in making assessments regarding directionality, given the cross-sectional nature of our study.


Assuntos
Aborto Espontâneo , Sulfato de Desidroepiandrosterona/sangue , Globulina de Ligação a Hormônio Sexual/metabolismo , Testosterona/sangue , Vitamina D/análogos & derivados , Adolescente , Adulto , Androgênios/sangue , Disponibilidade Biológica , Estudos de Coortes , Feminino , Humanos , Modelos Lineares , Vitamina D/sangue , Deficiência de Vitamina D/sangue , Adulto Jovem
9.
Hum Reprod ; 32(8): 1743-1750, 2017 08 01.
Artigo em Inglês | MEDLINE | ID: mdl-28854586

RESUMO

STUDY QUESTION: How are concentrations of plasma homocysteine and serum folate associated with reproductive hormones and anovulation in regularly menstruating women? SUMMARY ANSWER: Higher homocysteine was associated with sporadic anovulation and hormonal changes that may be indicative of impaired ovulatory function, but higher serum folate was associated only with higher luteal phase progesterone. WHAT IS KNOWN ALREADY: Higher folate levels as well as some variants in genes relevant to one-carbon metabolism, are associated with improved reproductive outcomes and responses to fertility treatment, but only a few small studies have explored the relationship between markers of one-carbon metabolism and menstrual cycle characteristics. STUDY DESIGN, SIZE, DURATION: The BioCycle Study (2005-2007) is a prospective, longitudinal cohort of 259 regularly menstruating women not using hormonal contraceptives or dietary supplements who were followed for up to two menstrual cycles. PARTICIPANTS/MATERIALS, SETTING, METHODS: Serum folate and reproductive hormones were measured up to eight times per cycle and plasma homocysteine up to three times. Linear mixed models were used to estimate associations between serum folate or plasma homocysteine and log-transformed reproductive hormone levels while accounting for multiple observations and cycles per woman. Generalized estimating equations were used to examine risk of sporadic anovulation. All models were adjusted for age, race, body mass index, cigarette and alcohol use, and energy and fiber intake. MAIN RESULTS AND THE ROLE OF CHANCE: Higher plasma homocysteine concentrations were associated with lower total estradiol across the cycle (adjusted percent change per unit increase in homocysteine [aPC] -2.3%, 95% CI: -4.2, -0.03), higher follicle stimulating hormone around the time of expected ovulation (aPC 2.4%, 95% CI: 0.2, 4.7) and lower luteal phase progesterone (aPC -6.5%, 95% CI: -11.1, -1.8). Higher serum folate concentrations were associated with higher luteal phase progesterone (aPC per unit increase in folate 1.0%, 95% CI: 0.4, 1.6). Higher homocysteine concentrations at expected ovulation were associated with a 33% increased risk of sporadic anovulation. We observed no risk associated with decreased folate concentrations, but a higher ratio of folate to homocysteine at ovulation was associated with a 10% decreased risk of anovulation. LIMITATIONS, REASONS FOR CAUTION: Our results are generalizable to healthy women with adequate serum folate levels. The independent influence of homocysteine should be confirmed in larger cohorts and among women with folate deficiency or increased risks of anovulation. WIDER IMPLICATIONS OF THE FINDINGS: If these findings are confirmed, it is possible that lowering homocysteine with B-vitamins through diet or supplementation could improve ovulatory function in some women. Study FUNDING/COMPETING INTEREST(S): This work was supported by the Intramural Research Program of the Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health (Contract numbers: HHSN275200403394C, HHSN275201100002I and Task one HHSN27500001). None of the authors has any conflicts of interest to disclose.


Assuntos
Ácido Fólico/sangue , Homocisteína/sangue , Ciclo Menstrual/sangue , Adolescente , Adulto , Índice de Massa Corporal , Estradiol/sangue , Feminino , Hormônio Foliculoestimulante/sangue , Humanos , Hormônio Luteinizante/sangue , Progesterona/sangue , Testosterona/sangue , Saúde da Mulher , Adulto Jovem
10.
J Nutr ; 147(2): 218-226, 2017 02.
Artigo em Inglês | MEDLINE | ID: mdl-27881593

RESUMO

BACKGROUND: Dairy food intake has been associated with infertility; however, little is known with regard to associations with reproductive hormones or anovulation. OBJECTIVE: We investigated whether intakes of dairy foods and specific nutrients were associated with reproductive hormone concentrations across the cycle and the risk of sporadic anovulation among healthy women. METHODS: We prospectively measured serum reproductive hormones ≤8 times/menstrual cycle for 2 cycles from 259 regularly menstruating women (mean age: 27.3 y). Dairy food intake was assessed via 24-h dietary recalls 4 times/cycle. Dairy food intakes were assessed by 1) total and low- and high-fat dairy products; 2) dairy nutrients, including fat, lactose, calcium, and phosphorus; and 3) dairy foods, including milk, cheese, butter, cream, yogurt, and ice cream categories. Weighted linear mixed models were used to evaluate associations between dairy nutrients or food intakes and hormone concentrations. Modified Poisson regression models with robust error variance were used to evaluate anovulation. Models were adjusted for age, body mass index, race, physical activity, Mediterranean diet score, total energy, protein, fiber, caffeine, and other hormones. RESULTS: Each serving increase in total and low- and high-fat dairy foods and all increases in amounts of all dairy nutrients tested were associated with an ∼5% reduction in serum estradiol concentrations but were not associated with anovulation. Total and high-fat dairy food intakes were positively associated with serum luteinizing hormone concentrations. We observed associations between intakes of >0 servings of yogurt (RR: 2.1; 95% CI: 1.2, 3.7) and cream (RR: 1.8; 95% CI: 1.0, 3.2) and a higher risk of sporadic anovulation compared with no intake. CONCLUSIONS: Our study showed associations between increasing dairy food and nutrient intakes and decreasing estradiol concentrations as well as between cream and yogurt intakes and the risk of sporadic anovulation. These results highlight the potential role of dairy in reproductive function in healthy women.


Assuntos
Anovulação , Laticínios/efeitos adversos , Estradiol/metabolismo , Progesterona/metabolismo , Testosterona/metabolismo , Adulto , Estradiol/sangue , Comportamento Alimentar , Feminino , Hormônio Foliculoestimulante/sangue , Hormônio Foliculoestimulante/metabolismo , Humanos , Hormônio Luteinizante/sangue , Hormônio Luteinizante/metabolismo , Progesterona/sangue , Globulina de Ligação a Hormônio Sexual/metabolismo , Testosterona/sangue , Adulto Jovem
11.
Am J Clin Nutr ; 103(3): 868-77, 2016 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-26843151

RESUMO

BACKGROUND: Emerging evidence suggests potential links between some dietary fatty acids and improved fertility, because specific fatty acids may affect prostaglandin synthesis and steroidogenesis. OBJECTIVE: The objective of this exploratory study was to evaluate associations between total and specific types of dietary fat intake and 1) hormone concentrations and 2) the risk of sporadic anovulation in a cohort of 259 regularly menstruating women in the BioCycle Study. DESIGN: Endogenous reproductive hormones were measured up to 8 times/cycle for up to 2 cycles, with visits scheduled with the use of fertility monitors. Dietary intake was assessed with up to four 24-h recalls/cycle. Linear mixed models and generalized linear models were used to evaluate the associations between dietary fatty acids and both reproductive hormone concentrations and ovulatory status. All models were adjusted for total energy intake, age, body mass index, and race. RESULTS: Relative to the lowest levels of percentage of energy from total fat, the highest tertile was associated with increased total and free testosterone concentrations (total: percentage change of 4.0%; 95% CI: 0.7%, 7.3%; free: percentage change of 4.1%; 95% CI: 0.5%, 7.7%). In particular, the percentage of energy from polyunsaturated fatty acids (PUFAs) in the highest tertile was associated with increases in total and free testosterone (total: percentage change of 3.7%; 95% CI: 0.6%, 6.8%; free: percentage change of 4.0%; 95% CI: 0.5%, 7.5%). The PUFA docosapentaenoic acid (22:5n-3) was not significantly associated with testosterone concentrations (P-trend = 0.86 in energy substitution models) but was associated with increased progesterone and a reduced risk of anovulation (highest tertile compared with the lowest tertile: RR: 0.42; 95% CI: 0.18, 0.95). Fat intakes were not associated with other reproductive hormone concentrations. CONCLUSIONS: These results indicate that total fat intake, and PUFA intake in particular, is associated with very small increases in testosterone concentrations in healthy women and that increased docosapentaenoic acid was associated with a lower risk of anovulation.


Assuntos
Anovulação , Dieta , Gorduras na Dieta/farmacologia , Ácidos Graxos Insaturados/farmacologia , Ovulação/efeitos dos fármacos , Progesterona/metabolismo , Testosterona/metabolismo , Adulto , Anovulação/etiologia , Anovulação/prevenção & controle , Gorduras na Dieta/administração & dosagem , Gorduras na Dieta/uso terapêutico , Ingestão de Energia , Ácidos Graxos Insaturados/administração & dosagem , Ácidos Graxos Insaturados/uso terapêutico , Comportamento Alimentar , Feminino , Humanos , Ciclo Menstrual , Estudos Prospectivos , Valores de Referência , Fatores de Risco , Adulto Jovem
12.
J Nutr ; 146(1): 98-106, 2016 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-26581679

RESUMO

BACKGROUND: Evidence is growing that the equilibrium between reactive oxygen species and antioxidants plays a vital role in women's reproductive health. OBJECTIVE: The objective of this study was to evaluate variations in serum antioxidant concentrations across the menstrual cycle and associations between antioxidants and reproductive hormones and anovulation among healthy women. METHODS: The BioCycle Study, a prospective cohort, followed 259 women aged 18-44 y for up to 2 menstrual cycles. Serum fat-soluble vitamin and micronutrient (α-tocopherol, γ-tocopherol, retinol, lutein, lycopene, and ß-carotene), ascorbic acid, and reproductive hormone concentrations were measured 5-8 times/cycle. We used weighted linear mixed models to assess associations between antioxidants and hormone concentrations, after adjustment for age, race, body mass index, parity, sleep, pain medication use, total energy intake, concurrent hormones, serum cholesterol, F2-isoprostanes, and other antioxidants. Generalized linear models were used to identify associations with anovulation. RESULTS: Serum antioxidant concentrations varied across the menstrual cycle. Retinol and α-tocopherol were associated with higher estradiol [RR: 1.00 pg/mL (95% CI: 0.67, 1.34 pg/mL); RR: 0.02 pg/mL (95% CI: 0.003, 0.03 pg/mL), respectively] and testosterone [RR: 0.61 ng/dL (95% CI: 0.44, 0.78 ng/dL); RR: 0.01 ng/dL (95% CI: 0.001, 0.01 ng/dL), respectively]. Ascorbic acid was associated with higher progesterone (RR: 0.15 ng/mL; 95% CI: 0.05, 0.25 ng/mL) and with lower follicle-stimulating hormone (RR: -0.06 mIU/mL; 95% CI: -0.09, -0.03 mIU/mL). The ratio of α- to γ-tocopherol was associated with an increased risk of anovulation (RR: 1.03; 95% CI: 1.01, 1.06). CONCLUSIONS: These findings shed new light on the intricate associations between serum antioxidants and endogenous hormones in healthy premenopausal women and support the hypothesis that concentrations of serum vitamins affect steroidogenesis even after adjustment for oxidative stress.


Assuntos
Antioxidantes/administração & dosagem , Hormônio Foliculoestimulante/sangue , Ovulação/efeitos dos fármacos , Adolescente , Adulto , Anovulação/sangue , Ácido Ascórbico/sangue , Carotenoides/sangue , Ingestão de Energia , F2-Isoprostanos/sangue , Feminino , Humanos , Modelos Lineares , Luteína/sangue , Licopeno , Ciclo Menstrual/sangue , Ciclo Menstrual/efeitos dos fármacos , Ovulação/metabolismo , Pré-Menopausa/sangue , Progesterona/sangue , Estudos Prospectivos , Inquéritos e Questionários , Testosterona/sangue , Vitamina A/sangue , Adulto Jovem , alfa-Tocoferol/sangue , beta Caroteno/sangue , gama-Tocoferol/sangue
13.
Fertil Steril ; 99(4): 1146-52, 2013 Mar 15.
Artigo em Inglês | MEDLINE | ID: mdl-23200685

RESUMO

Biomarkers are biologic compounds that are easily accessible and reflect normal physiology or pathology. They are useful in a variety of clinical situations that involve detection of subclinical disease, risk stratification, preoperative planning, and monitoring treatment. A useful intervention needs to exist for a biomarker to be an effective tool. Many compounds have been investigated as potential biomarkers for the diagnosis and surveillance of uterine leiomyomas. Most of these compounds demonstrate subtle differences among patients when leiomyomas are compared with controls. The compounds investigated lack the diagnostic accuracy necessary to add any benefit to the current available modalities used to diagnose and monitor uterine leiomyomas.


Assuntos
Leiomioma/diagnóstico , Leiomioma/metabolismo , Neoplasias Uterinas/diagnóstico , Neoplasias Uterinas/metabolismo , Biomarcadores/metabolismo , Biomarcadores Tumorais/metabolismo , Feminino , Humanos
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