American Journal of Obstetrics & Gynecology

Cross-border use of assisted reproductive technology in the United States, 2014 to 2022 - ART utilization in the US by top five countries, 2014-2022 https://ow.ly/4OIA50ZexVE

Beyond sutures: incorporating vascular insights into cesarean closure discussions - Blood supply for the lower uterine segment
A, Uterine cast. The vascular cast illustrates the 3-dimensional architecture of the uterine and ovarian arterial systems, highlighting their distinct regional perfusion patterns. The uterine arteries (UA) course medially with their characteristic tortuosity before dividing into an extensive, highly anastomosed network that supplies the uterine body and fundus. In contrast, the lower uterine segment—represented here by a relatively avascular oval region corresponding to the typical site of cesarean delivery—receives only sparse collateral branches. This abrupt transition from the minimally perfused lower segment to the richly interconnected arterial plexus just a few centimeters above underscores the physiological rationale for incising the lower uterine segment during cesarean birth. The OAs contribute additional collateral flow through the utero-ovarian arcade, further reinforcing the dense vascular supply of the upper uterus. B, Uterine blood supply. This schematic representation delineates the differential vascular supply of the lower and upper uterine segments. The lower part of the uterine segment, which receives blood supply by the CVA, is predominantly supplied by the descending branch of the uterine artery, receiving only limited collateral input—approximately 20%—from the vaginal arterial pedicle (VA). In contrast, the upper segment of the lower uterus (1, depicted in green) benefits from a far more robust perfusion pattern, with a fully developed anastomotic network supplied by 100% of the ascending uterine arterial branches. This clear distinction between the sparsely anastomosed cervicovaginal territory and the richly interconnected upper segment underscores the functional compartmentalization of uterine segment blood flow and helps explain the differences in oxygen delivery observed after surgical incisions in the lower and upper uterine segment sectors. https://ow.ly/vN8q50Zey7I

Placental histopathology and early childhood neurodevelopment in the Environmental influences on Child Health Outcomes cohort https://ow.ly/BRfn50ZexWK

Cross-border use of assisted reproductive technology in the United States, 2014 to 2022 - Global origin of non-US residents undergoing ART in US, 2014-2022 https://ow.ly/4OIA50ZexVE

AJOG Expert Review: Substance use and use disorders during pregnancy and the postpartum period - Fetal alcohol spectrum disorder associated and discriminating features https://ow.ly/ytFa50Vpzer

Venous thromboembolism with combined oral contraceptives based on estrogen and progestin content: a disproportionality analysis of the United States Food and Drug Administration Adverse Event Reporting System database https://ow.ly/F7TU50ZcEEl

A proposed classification of diabetes mellitus in pregnancy https://ow.ly/r0Um50ZcEzm