North American Fetal Therapy Network: Maternal Outcomes in Fetal Aqueductal Stenosis.

INTRODUCTION: Fetal aqueductal stenosis (AS) affects approximately 1:1,000 pregnancies. Obstruction of cerebral spinal fluid (CSF) circulation occurs at the aqueduct of Sylvius, leading to progressive hydrocephalus, often necessitating cesarean section (CS) with a classical uterine incision. The purpose of this study is to describe maternal outcomes associated with fetal aqueductal stenosis. METHODS: This study is conducted through the North American Fetal Therapy Network (NAFTNet). Subjects were recruited at the diagnosis of severe CNS ventriculomegaly and were followed longitudinally. Maternal events around the delivery of fetuses with AS were recorded and analyzed. RESULTS: Thirty-seven subjects with fetal AS confirmed by neonatal neuroimaging were analyzed. The average gestation at delivery was 36.7 weeks. Overall, 86% were delivered by cesarean section (CS), and 62% of these were elective. Sixty-two percent were delivered electively by cesarean section (CS). Eighty-six percent were delivered by cesarean section. Ninety one percent of CSs were performed through a Pfannenstiel abdominal incision. A classical uterine incision was required in 13% of cesarean deliveries. The peripartum complication rate was 27%. CONCLUSION: Women carrying a fetus with AS were at risk for preterm birth, cesarean delivery, a classical uterine incision, and peripartum complications. These data highlight the maternal morbidity associated with fetal AS, and the potential benefit of in-utero therapy not only for neonatal but also maternal outcomes.

Maternal outcomes of a cohort of pregnancies affected by non-immune hydrops fetalis.

OBJECTIVE: To describe the maternal outcomes of a prospective cohort of non-immune hydrops fetalis (NIHF) pregnancies with negative standard-of-care evaluations. METHODS: This study was a secondary analysis of a prospective cohort study of NIHF pregnancies with negative work-ups (infection, alloimmune anemia, fetomaternal hemorrhage, and chromosomal disorders). Outcomes were obstetric complications, including pre-eclampsia, mirror syndrome, preterm birth, polyhydramnios, postpartum hemorrhage, and maternal mental health. RESULTS: Forty pregnancies were included. Four patients developed pre-eclampsia (4/40, 10.0%); three occurred postpartum. None was diagnosed with mirror syndrome. Of the 31 continued pregnancies, 16 (51.6%) resulted in early fetal death or stillbirth and 15 (48.4%) resulted in live births. Of the 15 live births, 8 (53.3%) were delivered by primary cesarean delivery; 5 (62.5%) were for hydrops fetalis. Eleven live births (73.3%) were delivered preterm; 9 (81.8%) were indicated, most commonly for fetal indications (7/9, 77.8%). Polyhydramnios occurred in 14/40 (35.0%) cases. Where EBL was recorded (n=37), there were 5 (13.5%) cases of postpartum hemorrhage and an additional 3 (8.1%) had uterine atony without hemorrhage. Eighteen patients (18/40, 45.0%) had new-onset or exacerbated depression or anxiety symptoms. CONCLUSION: Our study identified several important adverse outcomes of pregnancies complicated by NIHF with negative standard-of-care evaluations, including a high rate of postpartum pre-eclampsia and worsened mental health. We identified a higher rate of cesarean delivery and preterm birth, both primarily for fetal indications. We also observed the known relationship between polyhydramnios, hemorrhage, and atony, but noted that this risk included pregnancies concluding in dilation and evacuation. Counseling after a diagnosis of NIHF should include these adverse outcomes.

Multimodal prenatal and postnatal imaging of microphthalmia with cyst.

Congenital ocular anomalies may be detected on prenatal imaging using fetal ultrasound and magnetic resonance imaging (MRI), although standard prenatal ultrasound for fetal physical development does not currently include ocular and orbital evaluation. We present the case of a male infant born at 39 weeks' gestation with microphthalmia with cyst that was characterized using serial multimodal imaging, including fetal ultrasound and MRI, B-scan ultrasonography, ultrasound biomicroscopy, and postnatal MRI. Multiple prenatal and postnatal imaging modalities yielded comparable evaluations of the ocular and orbital pathology, validating the prenatal assessments.

B-Flow/Spatiotemporal Image Correlation M-Mode and Contrast-Enhanced/Microbubble Ultrasonography Quantification of Spiral Artery Distensibility and Placental Intervillous Perfusion in the First Trimester in a Primate Model of Impaired Spiral Artery Remodeling.

OBJECTIVE: During early human pregnancy, placental trophoblasts remodel spiral arteries into distensible low-resistance vessels to promote placental perfusion. We have established a model of impaired spiral artery remodeling (SAR) by elevating estradiol levels in the first trimester of baboon pregnancy. In the present study, B-flow/spatiotemporal image correlation (STIC) M-mode ultrasonography, a non-Doppler technology for sharp rendering of vessel dimensions, was used to determine whether spiral artery distensibility was altered in SAR-suppressed baboons. Contrast-enhanced ultrasound/microbubble imaging was also performed to determine whether it detected changes in placenta intervillous space perfusion in SAR-suppressed baboons. METHODS: The two imaging procedures were performed in the first trimester in baboons not treated or treated with estradiol to suppress SAR. RESULTS: Spiral artery distensibility, that is, luminal diameter at systole minus diameter at diastole, and volume flow as quantified by B-flow/STIC M-mode were 26% (p = 0.03) and 55% (p = 0.059) lower, respectively, in SAR-suppressed baboons. However, placental intervillous space flow rate and video intensity plateau levels reflecting blood perfusion, quantified by contrast-enhanced ultrasound/microbubble imaging, were unaltered in SAR-suppressed baboons. CONCLUSION: The results indicate that B-flow/STIC M-mode ultrasonography provides a non-invasive method to detect reduced distensibility and, thus, function of spiral arteries across the cardiac cycle in the first trimester in a primate model of impaired SAR. This study represents a first step in determining whether B-flow/STIC M-mode detects a similar defect in SAR early in adverse human pregnancy. This would provide an avenue to develop therapeutic modalities to prevent the devastating consequences of impaired SAR.

Increased risk of severe COVID-19 in pregnancy in a multicenter propensity score-matched study.

OBJECTIVES: To explore the association between COVID-19 severity and pregnancy using measures such as COVID-19 ordinal scale severity score, hospitalization, intensive care unit (ICU) admission, oxygen supplementation, invasive mechanical ventilation, and death. METHODS: We conducted a retrospective, multicenter cohort study to understand the association between COVID-19 severity and pregnancy. We reviewed consecutive charts of adult females, ages 18-45, with laboratory testing for SARS-CoV-2 infection between March 1, 2020, and August 31, 2020. Cases were patients diagnosed with COVID-19 during pregnancy, whereas controls were not pregnant at the time of COVID-19 diagnosis. Primary endpoints were the COVID-19 severity score at presentation (within four hours) and the nadir of the clinical course. The secondary endpoints were the proportion of patients requiring hospitalization, ICU admission, oxygen supplementation, invasive mechanical ventilation, and death. RESULTS: A higher proportion of pregnant women had moderate to severe COVID-19 disease at the nadir of the clinical course than non-pregnant women (25 vs. 16.1 %, p=0.04, respectively). There was a higher rate of hospitalization (25.6 vs. 17.2 %), ICU admission (8.9 vs. 4.4 %), need for vasoactive substances (5.0 vs. 2.8 %), and invasive mechanical ventilation (5.6 vs. 2.8 %) in the pregnant cohort. These differences were not significant after applying propensity score matching.We found a high rate of pregnancy complications in our population (40.7 %). The most worrisome is the rate of hypertensive disorders of pregnancy (20.1 %). CONCLUSIONS: In our propensity score-matched study, COVID-19 in pregnancy is associated with an increased risk of disease severity and pregnancy complications.

The impact of early diagnosis of fetal single-ventricle cardiac defects on reproductive choices.

BACKGROUND: Congenital heart defects are the most common fetal anomaly. Congenital heart defects with single-ventricle cardiac defects have high mortality rates, and in pregnancies diagnosed with this condition, patients are often offered termination of pregnancy as an option. OBJECTIVE: This study aimed to investigate the relationship between gestational age at diagnosis and reproductive choices in fetuses diagnosed with single-ventricle cardiac defects. STUDY DESIGN: This was a retrospective single-center cohort study in which 158 patients with a fetal diagnosis of single-ventricle cardiac defects were reviewed. Cases were categorized as isolated or complex. Complex cases included fetuses with single-ventricle cardiac defects in addition to other fetal extracardiac anomalies or chromosomal abnormalities. RESULTS: A total of 158 patients were diagnosed with single-ventricle cardiac defects during the study period. Of those patients, 37 (23.4%) underwent termination of pregnancy, 113 (71.5%) delivered, and 8 (5.1%) had an intrauterine fetal demise. Gestational age at diagnosis and race were significant predictors of the termination decision. The median gestational age at diagnosis was earlier in the termination of pregnancy group (20.4 vs 23.6 weeks; P<.001). Pregnancies complicated by single-ventricle cardiac defects diagnosed in early gestation (11 0/7 to 14 5/7 weeks of gestation) were more likely to be terminated than pregnancies complicated by single-ventricle cardiac defects diagnosed in middle gestation (15 0/7 to 27 5/7 weeks of gestation) and late gestation (≥28 weeks of gestation) (54.2% vs 23.2% and 2.9%; P<.001). Earlier gestational age at diagnosis was correlated with earlier gestational age at termination (r=0.92; P<.001). CONCLUSION: Termination of pregnancy was more common when the single-ventricle cardiac defect was diagnosed earlier in pregnancy. This could be explained by the fact that early diagnoses allow parents to make deliberate and informed decisions.

The value of detailed first-trimester ultrasound in the era of noninvasive prenatal testing.

BACKGROUND: In 2020, the American College of Obstetricians and Gynecologists recommended noninvasive prenatal testing be offered to all patients. However, current societal guidelines in the United States do not universally recommend a detailed first-trimester ultrasound. OBJECTIVE: This study aimed to determine the additional findings identified through first-trimester ultrasound that would have otherwise been missed if noninvasive prenatal testing was used alone as a first-trimester screening method. STUDY DESIGN: This was a retrospective cohort study involving 2158 pregnant patients and 2216 fetuses that were seen at a single medical center between January 1, 2020, and December 31, 2022. All those included underwent both noninvasive prenatal testing and detailed first-trimester ultrasound between 11.0 and 13.6 weeks of gestation. Noninvasive prenatal testing results were categorized as low risk or high risk, and first-trimester ultrasound results were categorized as normal or abnormal. Abnormal first-trimester ultrasounds were further classified as first-trimester screening markers (increased nuchal translucency, absent nasal bone, tricuspid regurgitation, and ductus venosus reverse a-wave) or structural defects (the cranium, neck, heart, thorax, abdominal wall, stomach, kidneys, bladder, spine, and extremities). Descriptive statistics were used to report our findings. RESULTS: Of 2216 fetuses, 65 (3.0%) had a high-risk noninvasive prenatal testing result, whereas 2151 (97.0%) had a low-risk noninvasive prenatal testing result. Of those with a low-risk noninvasive prenatal testing result, 2035 (94.6%) had a normal first-trimester ultrasound, whereas 116 (5.4%) had at least 1 abnormal finding on first-trimester ultrasound. The most common screening marker detected within the low-risk noninvasive prenatal testing group was absent nasal bone (52/2151 [2.4%]), followed by reversed a-wave of the ductus venosus (30/2151 [1.4%]). The most common structural defect in this group was cardiac abnormality (15/2151 [0.7%]). Overall, 181 fetuses were identified as having "abnormal screening" through either a high-risk noninvasive prenatal testing result (n=65) or through a low-risk noninvasive prenatal testing result but abnormal first-trimester ultrasound (n=116). In summary, the incorporation of first-trimester ultrasound screening identified 116 additional fetuses (5.4%) that required further follow-up and surveillance than noninvasive prenatal testing alone would have identified. CONCLUSION: Detailed first-trimester ultrasound identified more fetuses with a potential abnormality than noninvasive prenatal testing alone. Therefore, first-trimester ultrasound remains a valuable screening method that should be used in combination with noninvasive prenatal testing.

A pilot study: Application of paired ultrasound simulator training in obstetrics.

OBJECTIVE: Medical trainees in obstetrics must develop competency in fetal ultrasonography. To date, no studies have utilized ultrasound simulator training for basic fetal anatomy with paired didactic coursework. We hypothesize that ultrasound simulator training with paired didactics improves medical trainee competency in fetal ultrasonography. METHODS: A prospective observational study was performed at a tertiary care center during the 2021-2022 academic year. Medical trainees in obstetrics without prior simulator experience could participate. Participants completed ultrasound simulator training with standardized paired didactics and subsequent real-time patient scanning. All images were reviewed by the same physician for competency. Trainees completed 11-point Likert scale surveys at three time points: pre-simulator, post-simulator, and post-real-time patient scanning. Two-tailed student's t-tests with 95% confidence intervals were performed, and p-values <0.05 were considered significant. RESULTS: Of the 26 trainees that completed the training, 96% reported that simulation positively impacted their confidence and ability to perform real-time scanning of patients. Self-reported knowledge of fetal anatomy, ultrasound techniques, and application to clinical obstetrics all significantly increased after simulator training (p < 0.01). CONCLUSIONS: Paired ultrasound simulation with didactic instruction significantly improves medical trainees' knowledge of fetal anatomy and ability to perform fetal ultrasonography. Implementing an ultrasound simulation curriculum may become an essential tool for obstetric residency programs.

Added prognostic value of Doppler ultrasound for adverse perinatal outcomes: A pooled analysis of three cohort studies.

BACKGROUND: Fetal growth restriction (FGR) is an obstetric complication associated with adverse perinatal outcomes. Doppler ultrasound can improve perinatal outcomes through monitoring at-risk fetuses and helping time delivery. AIM: To investigate the prognostic value of different Doppler ultrasound measurements for adverse perinatal outcomes. MATERIALS: Individual participant data. METHODS: We performed a pooled analysis on individual participant data. We compared six prognostic models using multilevel logistic regression, where each subsequent model added a new variable to a base model that included maternal characteristics. Estimated fetal weight (EFW) and four Doppler ultrasound measurements were added in turn: umbilical artery pulsatility index (UA PI), middle cerebral artery pulsatility index (MCA PI), cerebroplacental ratio (CPR), and mean uterine artery pulsatility index (mUtA PI). The primary outcome was a composite adverse perinatal outcome, defined as perinatal mortality, emergency caesarean delivery for fetal distress, or neonatal admission. Discriminative ability was quantified with area under the curve (AUC). RESULTS: Three data sets (N = 3284) were included. Overall, the model that included EFW and UA PI improved AUC from 0.650 (95% CI 0.624-0.676) to 0.673 (95% CI 0.646-0.700). Adding more ultrasound measurements did not improve further the discriminative ability. In subgroup analysis, the addition of EFW and UA PI improved AUC in both preterm (AUC from 0.711 to 0.795) and small for gestational age pregnancies (AUC from 0.729 to 0.770), but they did not improve the models in term delivery or normal growth subgroups. CONCLUSIONS: Umbilical artery pulsatility index added prognostic value for adverse perinatal outcomes to the already available information, but the combination of other Doppler ultrasound measurements (MCA PI, CPR or UtA PI) did not improve further prognostic performance.

The Optimal Cesarean Skin Incision in Patients with Super Obesity.

OBJECTIVE: This study aimed to evaluate if supraumbilical midline vertical incision performed in patients with a hanging pannus (umbilicus at the level of the pubic bone) is a reasonable alternative to the Pfannenstiel in patients with body mass index (BMI) ≥ 50 kg/m2 undergoing cesarean delivery. STUDY DESIGN: Retrospective cohort study in patients with BMI ≥ 50 kg/m2 undergoing cesarean delivery at a single center from 2016 to 2020. Study groups were Pfannenstiel's versus supraumbilical vertical skin incision. If patients had a hanging pannus (umbilicus at the level of the pubic bone), vertical incisions were performed. Otherwise, Pfannenstiel's incision was performed. Decision for the incision was made prospectively. Primary outcome was a composite of need for blood transfusion, presence of immediate surgical complications, and presence of delayed surgical complications. Secondary outcomes included the individual components of the primary outcome, the median surgical blood loss, total operative time, time from skin incision to delivery of neonate, hysterotomy type, and neonatal outcomes. MedCalc 19.5.1 was used for analysis. RESULTS: A total of 103 patients with BMI ≥50 kg/m2 were included. Of those, 68 (66%) had Pfannenstiel's and 35 (34%) had supraumbilical vertical incisions. There was no statistically significant difference in the incidence of the primary outcome (12 vs. 11%, p = 0.96). There was neither significant difference in immediate or delayed postoperative complications nor in neonatal outcomes. However, patients in the vertical midline incision group were more likely to have a classical hysterotomy (52%) compared with the Pfannenstiel group (6%; p < 0.05), increased overall median surgical blood loss (1,000 vs. 835 mL, p < 0.05), and increased total surgical time by a median of 30 minutes (p < 0.05). CONCLUSION: In patients with super obesity and hanging pannus, performing a supraumbilical vertical midline incision offers a reasonable alternative to Pfannenstiel's incision, but patients should be counseled about the increased risk for classical hysterotomy and implications in future pregnancies. KEY POINTS: · Patients with BMI >50 kg/m2 were allocated to different incision types based on subcutaneous fat distribution pattern. If umbilicus was at level of pubic bone, supraumbilical vertical skin incision was made. · There were no significant differences between Pfannenstiel's and supraumbilical vertical incisions in terms of the composite outcome and immediate or delayed postoperative complications and neonatal outcomes.. · In patients with a hanging pannus, performing a supraumbilical vertical midline incision offers a reasonable alternative to Pfannenstiel's incision, but patients should be counseled about the increased risk for classical hysterotomy and subsequent implications in future pregnancies..

Impact of middle cerebral artery pulsatility index on donor survival in twin-twin transfusion syndrome.

OBJECTIVE: To assess outcomes in twin-twin transfusion syndrome (TTTS) according to middle cerebral artery pulsatility index (MCA-PI) prior to fetoscopic laser photocoagulation (FLPC) surgery. METHODS: A retrospective cohort analysis of monochorionic-twin pregnancies complicated by TTTS who underwent FLPC at two fetal centers (2012-2021). The cohort was stratified according to abnormal MCA-PI of the donor twin, defined as below fifth centile for gestational age. RESULTS: Abnormal MCA-PI of the donor twin was detected in 46 (17.7%) cases compared to 213 (83.3%) controls with no such abnormality. The abnormal PI group presented with higher rates of sFGR (56.5% vs. 36.8% in controls, p = 0.014) and lower donor survival rates within 48 h after FLPC (73.9 vs. 86.8%, p = 0.029). Donor twin survival rates at the time of delivery and 30 days after birth were lower in the abnormal MCA-PI. Multivariate logistic regression analysis controlling for sFGR and MCA-PI

Temporal Trend of COVID-19 Clinical Severity and the Ethnic/Racial Disparity: A Report from the Maryland Study Group.

OBJECTIVES: This study aimed to evaluate the temporal trend of novel coronavirus disease 2019 (COVID-19) symptoms and severity of clinical outcomes among pregnant women over a calendar year in the State of Maryland and compare clinical outcomes between different ethnic and racial groups. STUDY DESIGN: We conducted a retrospective, multicenter observational study of the temporal trend of COVID-19 clinical presentation during pregnancy in the State of Maryland. We reviewed consecutive charts of adult pregnant females, aged 18 to 55 years, with laboratory-confirmed severe acute respiratory syndrome-coronavirus-2 (SARS-CoV-2) infection between March 1, 2020, and February 28, 2021, and managed within the University of Maryland Medical System and Johns Hopkins Medicine. We excluded cases with insufficient data for assessing the COVID-19 diagnosis, pregnancy status, or clinical outcomes. We evaluated the evolution of COVID-19 symptoms at the time of presentation. Also, we compared COVID-19 infection rate, hospitalization rate, oxygen use, and intensive care unit (ICU) admission rates between different ethnic and racial groups. RESULTS: We included 595 pregnant women with laboratory-confirmed COVID-19 over the study period. The prevalence of respiratory and systemic symptoms decreased over time with incidence rate ratios (IRRs) of 0.91 per month (95% confidence interval [CI]: 0.88-0.95) and 0.87 per month (95% CI: 0.83-0.95), respectively. The prevalence of hospitalization, O2 requirement, and ICU admission decreased over time with IRRs of 0.86 per month (95% CI: 0.82-0.91), 0.91 per month (95% CI: 0.84-0.98), and 0.70 per month (95% CI: 0.57-0.85), respectively. The Hispanic and Black populations had a higher COVID-19 infection rate and hospitalization rate than the non-Hispanic White population (p = 0.004, < 0.001, and < 0.001, respectively). CONCLUSION: Understanding the concepts of viral evolution could potentially help the fight against pandemics like COVID-19. Moreover, this might improve the knowledge of how pandemics affect disadvantaged populations and help close the gap in health care inequities. KEY POINTS: · A trade-off between virulence and transmissibility is determined by the natural selection of viruses.. · Understanding the concepts of viral evolution can help the fight against pandemics like COVID-19.. · Evolution of SARS-CoV-2 over time resulted in decreased virulence and increased infectivity..

General versus Regional Anesthesia and Neonatal Data: A Propensity-Score-Matched Study.

OBJECTIVE: This study aimed to evaluate whether there is a difference in neonatal outcomes with general anesthesia (GA) versus regional anesthesia (RA) when induction of anesthesia to delivery time (IADT) is prolonged (≥10 minutes). STUDY DESIGN: This is a retrospective case-control study that included cases from July 2014 until August 2020. We reviewed all singleton pregnancies delivered between 24 and 42 weeks of gestation with IADT ≥ 10 minutes. Urgent deliveries, those who received RA for labor pain management or started cesarean delivery under RA and converted to GA, as well as cases with fetal anomalies, were excluded. The propensity score (PS) matching method was performed using age, ethnicity/race, body mass index, gestational age at delivery, preexisting maternal comorbidities, and pregnancy complications. Analyses were performed with SAS software version 9.4. RESULTS: During the study period, we identified 258 cases meeting inclusion criteria. After the PS matching was applied, the study sample was reduced to 60 cases in each group. The median IADT and uterine incision to delivery time were similar between groups (41.5 [30.5, 52] vs. 46 minutes [38, 53.5], p = 0.2 and 1.5 [1, 3] vs. 2 minutes [1, 3], respectively). There was no significant difference between groups with respect to arterial or venous cord pH (7.24 [7.21, 7.26] vs. 7.23 [7.2, 7.27], p = 0.7 and 7.29 [7.26, 7.33] vs. 7.3 [7.26, 7.33], p = 0.4, respectively). Nor were there any associations between maternal characteristics and Apgar's score at 5 minutes, except for Apgar's score at 1 minute (p < 0.001). No significant difference was identified in the rate of admission to the neonatal intensive care unit (NICU; 11 [52.4%] vs. 10 [47.6%], p = 0.8) or NICU length of stay between GA and RA (4 [3, 14] vs. 4.5 [3, 11], p = 0.9). CONCLUSION: Our data indicate that even with prolonged IADT, favorable neonatal outcomes are seen with both GA and RA, in contrast with previous studies performed decades ago. KEY POINTS: · Improving cesarean delivery safety, including the safety of anesthesia, is of paramount importance.. · Reappraisal of historical outcomes is warranted as advances in the medical field unfold.. · Favorable neonatal outcomes are seen with both general and regional anesthesia..

Fetoscopic laser surgery for twin-to-twin transfusion syndrome in DCTA triplets compared to MCDA twins: collaborative study and literature review.

OBJECTIVE: To compare the outcomes of dichorionic triamniotic (DCTA) triplets with that of monochorionic diamniotic (MCDA) twin gestations undergoing fetoscopic laser surgery (FLS) for treatment of twin-to-twin transfusion syndrome (TTTS). METHODS: Retrospective cohort study of prospectively collected data of consecutive DCTA triplet and MCDA twin pregnancies with TTTS that underwent FLS at two fetal treatment centers between 2012 and 2020. Preoperative, operative and, postoperative variables were collected. Perinatal outcomes were investigated. Primary outcome was survival to birth and to neonatal period. Secondary outcomes were gestational age (GA) at birth and procedure-to-delivery interval. Literature review was conducted in which PubMed, Web of Science, and Scopus were searched from inception to September, 2020. RESULTS: Twenty four sets of DCTA triplets were compared to MCDA twins during the study period. There were no significant differences in survival (no survivor, single, or double survivors) to birth and to the neonatal period of the MC twin pairs of the DCTA triplets vs MCDA twins. Median GA at delivery was approximately three weeks earlier in DCTA triplets compared to MCDA twins (28.4 weeks vs 31.4 weeks, p = .035, respectively). Rates of preterm birth (PTB) less than 32 and less than 28 weeks were significantly higher in DCTA triplets compared to twins (<32 weeks: 70.8% vs 51.1%, p = .037, respectively, and <28 weeks: 37.5% vs 20.8%, p = .033, respectively). CONCLUSION: Perinatal survival including fetal and neonatal are comparable between DCTA triplets and MCDA twins. However, this might have resulted from the small sample size of the DCTA triplets. GA at delivery is earlier in triplets, which could be due to the nature of triplet gestation rather than to the laser procedure itself.

Third Trimester Ultrasound Stratifies Risk of Peripartum Complications in Pregnancies Complicated by Impaired Glucose Tolerance.

OBJECTIVE: The objective of our study was to investigate the effect of impaired glucose metabolism (IGM) and ultrasound (US) findings consistent with hyperglycemia on maternal and neonatal outcomes. STUDY DESIGN: This was a retrospective case-control study of singleton, nonanomalous pregnancies with an elevated 1-hour glucose screening test (GST) completed after 23 weeks of gestation. IGM was defined as a 1-hour GST of >130, but less than two abnormal values on 3-hour glucose tolerance test (GTT). Gestational diabetes was defined as two or more abnormal values on 3-hour GTT. Ultrasound evidence of hyperglycemia was defined as abdominal circumference >95th centile and/or polyhydramnios. Individuals with IGM were divided into those with ultrasound evidence of hyperglycemia (impaired glucose metabolism consistent with ultrasound findings [IGM-US]) and those without IGM. Maternal demographics, delivery outcomes (gestational age at delivery, delivery mode, shoulder dystocia, lacerations), postpartum hemorrhage, and neonatal outcome (birth weight centile [BW%], neonatal intensive care unit admission, hypoglycemia, and glucose) were recorded. Composite morbidity was tabulated. Delivery and neonatal outcome variables were compared in individuals with IGM-US, IGM, and gestational diabetes mellitus (GDM). Odds ratios were calculated and adjusted for maternal age, BMI, and gestational weight gain. RESULTS: A total of 637 individuals with an abnormal 1-hour GST were included (122 with IGM-US, 280 with IGM, and 235 with GDM). When compared to the IGM group, IGM-US had higher rates of cesarean delivery and BW% > 90th centile at delivery (adjusted odds ratio [aOR]: 1.7 [1.1-2.8] and aOR: 5.9 [2.7-13.0], respectively). Individuals with GDM also demonstrated similar rates with BW% > 90% but not cesarean section(aOR: 3.9 [1.8-8.5] and aOR: 1.4 [0.9-2.1], respectively). The remaining maternal and fetal outcomes were similar. CONCLUSION: Women with impaired glucose tolerance should have a third-trimester ultrasound to identify an increased risk of perinatal complications. KEY POINTS: · Women with elevated blood glucose screening should be evaluated with third-trimester ultrasound to identify risks for perinatal morbidity.. · The third-trimester ultrasound identifies individuals at risk for cesarean section.. · Counseling should be completed with individuals with polyhydramnios or accelerated growth..

Perinatal outcomes of twin-to-twin transfusion syndrome associated with evidence of twin anemia polycythemia using different standardized definitions.

OBJECTIVES: To evaluate the survival of twin-to-twin transfusion syndrome (TTTS) and concomitant twin anemia polycythemia sequence (TAPS) compared to TTTS without TAPS at the time of fetoscopic laser photocoagulation (FLP). METHODS: TTTS pregnancies undergoing FLP were divided to three groups including (i) traditional TAPS definition of middle cerebral artery (MCA) peak systolic velocity (PSV) < 1 multiple of the median (MoM) in recipient and > 1.5 MoM in the donor fetus, (ii) delta MCA-PSV > 0.5 MoM and (iii) delta MCA-PSV > 1.0 MoM. RESULTS: A total of 353 monochorionic twins underwent FLP for TTTS. Based on the traditional definition, 335 (94.9 %) had TTTS only and 18 (5.1 %) had TTTS + TAPS. There were 245 (69.4 %) TTTS only and 108 (30.6 %) TTTS + TAPS considering delta MCA-PSV > 0.5 MoM and 339 (96 %) TTTS only and 14 (4 %) TTTS + TAPS considering delta MCA-PSV > 1.0 MoM. No significant differences in survival were noted at birth or 30-days after delivery between TTTS and TTTS with TAPS patients using the traditional definition, delta > 0.5 MoM or delta > 1.0 MoM. CONCLUSION: The rate of neonatal survival at birth or at 30-days of life following FLP for TTTS only and TTTS with TAPS were not different based on any of the clinically used TAPS definitions.

Perinatal outcomes of pregnancies with twin-anemia polycythemia sequence complicating twin-to-twin transfusion syndrome using different twin-anemia polycythemia sequence diagnostic criteria.

OBJECTIVE: To investigate whether the presence of twin-anemia polycythemia sequence (TAPS) with twin-to-twin transfusion syndrome (TTTS) or post-laser TAPS would change outcomes using different TAPS diagnostic criteria. METHODS: TTTS cases undergoing laser surgery between 2012 and 2020 were included. Groups included pre-laser TTTS-only compared to TTTS + TAPS, and no post-laser TAPS compared to post-laser TAPS. Three prenatal TAPS diagnostic criteria were used: group A: middle cerebral artery-peak systolic velocity (MCA-PSV) > 1.5 MoM in one twin and <1 MoM in the other twin, group B: inter-twin MCA-PSV difference >1 MoM, and group C: inter-twin MCA-PSV difference >0.5 MoM. Perinatal outcomes including survival and severe cerebral injury were investigated. RESULTS: 174 laser procedures were included. TTTS + TAPS cases were 16 in group A, 17 in group B, and 29 in group C. Post-laser TAPS cases were 11 in group A, 6 in group B, and 12 in group C. There were no differences in preoperative, operative variables and outcomes including survival and severe cerebral injury between groups using all three TAPS diagnostic criteria. The incidence of TTTS + TAPS was highest in group C (16.7%), then group B (9.8%), followed by group A (9.2%). The incidence of post-laser TAPS was highest in group C (9%), then group A (8.3%), followed by group B (4.5%). CONCLUSION: Presence of TAPS complicating TTTS and presence of post-laser TAPS do not seem to be associated with worse perinatal outcomes including postnatal-ultrasound detected cerebral injury using three different TAPS criteria. Collaborative studies are needed to investigate the validity and the performance of different TAPS criteria.

Proximate Cord Insertion in Twin-to-Twin Transfusion Syndrome: Case Series and PRISMA Compliant Systematic Review and Meta-Analysis.

OBJECTIVE: We aimed to investigate the prevalence and clinical outcomes of twin-to-twin transfusion syndrome (TTTS) with proximate cord insertions. METHODS: This was retrospective cohort study of TTTS cases managed at single fetal center between 2012 and 2020. Presence of proximate cord insertions was defined as a distance of equal or less than 4 cm between placental cord insertions that was recorded based on sonographic and fetoscopic examinations. Clinical outcomes were investigated compared to unmatched cohort and to 1:2 matched controls using preoperative variables including Quintero staging, selective fetal growth restriction, anterior placenta, preoperative cervical length, and gestational age at fetal intervention. Systematic review and meta-analysis were conducted following PRSMA guidelines through searching PubMed, Scopus, CINAHL, and Medline databases from inception until January 2021. RESULTS: The prevalence of proximate cord insertions in monochorionic placentas with TTTS was 2% (5/246). All 5 cases were managed by fetoscopic laser surgery (FLS). Procedure time was significantly longer (mean: 61.4 min in proximate cord vs. 37.5 min in nonproximate cord, p < 0.001), and amnioinfusion was significantly more common (100% in proximate cord vs. 43% in nonproximate cord, p = 0.01). Perinatal survival and neonatal outcomes were not different between groups. Similar findings were seen following 1:2 control matching. Systematic review yielded total of 19 case reports of which different management options were applied including FLS (n = 13), amniodrainage (n = 3), and selective reduction (n = 3). Clinical outcomes results were mixed and inconsistent. FLS was described as technically challenging and residual anastomosis was common. Overall fetal and neonatal survival following FLS was 85% and 80%, respectively. CONCLUSION: Presence of proximate cords in TTTS cases poses serious technical challenges even for highly experienced surgeons. Feasibility should be only determined by fetoscopic examination.

Single fetal demise following fetoscopic ablation for twin-to-twin transfusion syndrome-cohort study, systematic review, and meta-analysis.

BACKGROUND: Several studies have assessed preoperative and operative factors associated with fetal demise after laser for TTTS, yet these findings are not completely conclusive. OBJECTIVE: This study aimed to identify risk factors for single fetal demise (recipient and donor twins) after fetoscopic laser photocoagulation for twin-to-twin transfusion syndrome. STUDY DESIGN: We searched PubMed, Scopus, and Web of Science systematically from the inception of the database to June 2020. We conducted a systemic review on studies investigating risk factors for fetal demise (donor and/or recipient) after fetoscopic laser photocoagulation in monochorionic pregnancies complicated with twin-to-twin transfusion syndrome. Initially, we investigated the cohort of women with twin-to-twin transfusion syndrome that underwent fetoscopic laser photocoagulation at our 2 high-volume fetal centers between 2012 and 2020 to identify risk factors for donor demise and recipient demise. Furthermore, we conducted a systematic review of the literature to better characterize these factors. Among studies that met the entry criteria, multiple preoperative and operative factors were tabulated. The random-effect model was used to pool the standardized mean differences or odds ratios and corresponding 95% confidence intervals. Heterogeneity was assessed using the I2 value. RESULTS: A total of 514 pregnancies with twin-to-twin transfusion syndrome managed with fetoscopic laser photocoagulation were included in the final analysis. Following the logistic regression, factors that remained significant for donor demise were selective fetal growth restriction (odds ratio, 1.9; 95% confidence interval, 1.3-2.8; P=.001) and umbilical artery blood flow with absent or reversed end-diastolic velocity of the donor (odds ratio, 2.06; 95% confidence interval, 1.2-3.4; P=.004). A significant factor associated with recipient demise was absent or reversed a-wave in the ductus venosus of the recipient (odds ratio, 1.74; 95% confidence interval, 1.07-3.13; P=.04). Data from 23 studies and our current cohort were included. A total of 4892 pregnancies with twin-to-twin transfusion syndrome managed with fetoscopic laser photocoagulation were analyzed for risk factors for donor demise, and 4594 pregnancies with twin-to-twin transfusion syndrome were analyzed for recipient demise. Among studies, the overall incidence rates ranged from 10.9% to 35.8% for donor demise and 7.3% to 24.5% for recipient demise. Significant risk factors for donor demise were intertwin estimated fetal weight discordance of >25% (odds ratio, 1.86; 95% confidence interval, 1.44-2.4; I2, 0.0%), selective fetal growth restriction (odds ratio, 1.78; 95% confidence interval, 1.4-2.27; I2, 0.0%), twin-to-twin transfusion syndrome stage III (odds ratio, 2.18; 95% confidence interval, 1.53-3.12; I2, 0.0%), umbilical artery blood flow with absent or reversed end-diastolic velocity of the donor (odds ratio, 2.31; 95% confidence interval, 1.9-2.8; I2, 23.7%), absent or reversed a-wave in the ductus venosus of the donor (odds ratio, 1.83; 95% confidence interval, 1.45-2.3; I2, 0.0%), and presence of arterioarterial anastomoses (odds ratio, 2.81; 95% confidence interval, 1.35-5.85; I2, 90.7%). Sequential selective coagulation was protective against donor demise (odds ratio, 0.31; 95% confidence interval, 0.16-0.58; I2, 0.0%). Significant risk factors for recipient demise were twin-to-twin transfusion syndrome stage IV (odds ratio, 2.18; 95% confidence interval, 1.01-4.6; I2, 16.5%), umbilical artery blood flow with absent or reversed end-diastolic velocity of the recipient (odds ratio, 2.68; 95% confidence interval, 1.91-3.74; I2, 0.0%), absent or reversed a-wave in the ductus venosus of the recipient (odds ratio, 2.37; 95% confidence interval, 1.55-3.64; I2, 60.2%), and middle cerebral artery peak systolic velocity of >1.5 multiple of the median (odds ratio, 3.06; 95% confidence interval, 1.36-6.88; I2, 0.0%). CONCLUSION: Abnormal blood flow patterns represented by abnormal Doppler studies and low fetal weight were associated with single fetal demise in women with twin-to-twin transfusion syndrome undergoing laser therapy. Although sequential selective coagulation was protective against donor demise, the presence of arterioarterial anastomoses was considerably associated with donor demise. This meta-analysis extensively investigated the association of a wide range of preoperative and operative factors with fetal demise. These findings may be important inpatient counseling, in further understanding the disease, and perhaps in improving surgical techniques.