Placental histopathology in IVF pregnancies resulting from the transfer of frozen-thawed embryos compared with fresh embryos.

PURPOSE: To study whether placentas of singleton pregnancies conceived after fresh embryo transfer (ET) contain more histopathological lesions compared with placentas of singleton pregnancies conceived after frozen-thawed embryo transfer (FET). METHODS: A prospective cohort study of placental histopathology in 131 women with singleton IVF pregnancies who delivered at a single medical center, between December 2017 and May 2019. The prevalence of different placental histopathology lesions was compared between women who conceived after fresh ET and FET. RESULTS: Women who conceived after fresh ET (n = 74) did not differ from women who conceived after FET (n = 57) with regard to maternal age, BMI, nulliparity, or infertility diagnosis. Gestational week at delivery was lower in pregnancies conceived after fresh ET (38.5 vs. 39.2 weeks, respectively, p = 0.04), and a trend for a lower birthweight following fresh ET was noted (3040 vs. 3216 g, respectively, p = 0.053). However, placental histopathology analysis from pregnancies conceived after fresh ET was comparable to pregnancies conceived after FET, with regard to the prevalence of maternal vascular malperfusion lesions (45.9% vs. 50.9%, respectively, p = 0.57), fetal vascular malperfusion lesions (17.6% vs. 21.1, p = 0.61), acute inflammatory response lesions (28.4% vs. 28.1%, respectively, p = 0.96), and chronic inflammatory response lesions (13.5% vs. 8.8%, respectively, p = 0.48). CONCLUSION: Placental histopathology did not differ between IVF pregnancies conceived after fresh and frozen ET. These results are reassuring for clinicians and patients who wish to pursue with transferring fresh embryos.

Fixed-time interval vs on-demand oral analgesia after vaginal delivery: a randomized controlled trial.

BACKGROUND: Scheduled administration of analgesics was proven superior to on-demand dosing following cesarean deliveries. However, this protocol was not compared after vaginal delivery. OBJECTIVE: To compare the efficacy of a fixed- vs on-demand analgesic protocol for the management of pain in the first 24 hours after a vaginal delivery. STUDY DESIGN: This randomized, prospective, controlled trial was conducted at a single tertiary medical center between June 1, 2020 and June 30, 2022. Vaginally delivered patients were randomly assigned to receive oral analgesics (paracetamol 1 g + ibuprofen 400 mg) either every 6 hours for the first 24 hours postpartum (scheduled analgesia group) or as needed (on-demand group). Pain level during the first 24 hours postdelivery was measured using a 10-point visual analog scale. RESULTS: A total of 200 patients were randomized 1:1 to the 2 cohorts. Baseline and delivery characteristics, including oxytocin augmentation, epidural anesthesia, episiotomy rate, and neonatal birthweight, were comparable between groups. Patients in the scheduled group received more paracetamol and ibuprofen doses in the first 24 hours (2.9±1.3 and 2.9±1.2 doses vs 0.8±1.1 and 0.7±1.1 doses, respectively; P<.001). Pain score was comparable between study groups (5.31±1.92 vs 5.29±1.67; P=.626) even after subanalysis for primiparity, episiotomy, and vacuum-assisted delivery (P>.05). However, patients on a fixed treatment schedule were more likely to breastfeed their baby (98% vs 88%; P=.006) as than those receiving treatment on demand. In addition, they were more satisfied with their labor and delivery experience, as evaluated by Birth Satisfaction Scale questionnaires quality control (37.9±4.7 vs 31.1±5.2; P=.0324), patient attributes (35.0±5.1 vs 30.3±6.3; P=.0453), and stress experienced (58.1±8.5 vs 50.1±8.3; P=.0398). No side effects or adverse outcomes were reported in either group. CONCLUSION: A scheduled analgesic protocol for postpartum pain management following vaginal delivery revealed similar pain scores compared with an on-demand protocol, although it was associated with higher breastfeeding rates and higher maternal satisfaction.