#obstetrics

• Abdominohysterotomy — A surgical procedure consisting of incising the uterine wall via a transabdominal approach (entering through the belly wall), primarily used for delivering a fetus (cesarean section) or removing intramural tumors. In historical psychiatric clinics, this maneuver was studied in relation to severe surgical shock or the occurrence of post-cesarean puerperal psychoses in emotionally predisposed patients.
• Abdominouterotomy — A synonymous terminological variant for 'abdominohisterotomie', denoting the surgical operation of incising the uterus via a transabdominal approach (cutting both the abdominal wall and the uterine wall). Used in Romanian medical literature during the neological transition period, the term is closely linked to the evolution of cesarean section techniques and the management of major gynecological complications, studied in correlation with acute abdominal surgical traumas and the incidence of puerperal psychoses.
• Acardiac — Lacking a heart, or possessing a rudimentary, completely non-functional heart. In neonatology and fetal medicine, the term describes an 'acardiac fetus' (or acardiac twin), an extremely rare congenital anomaly occurring exclusively in monochorionic twin pregnancies due to Twin Reversed Arterial Perfusion (TRAP sequence). In this condition, the malformed fetus survives in utero only because it receives blood pumped by the heart of its healthy co-twin (the pump twin).
• Acardia — A congenital absence of the heart or a complete cessation in the ontogenetic development of the cardiac structure in a fetus. This severe structural anomaly is incompatible with independent extrauterine life and is documented almost exclusively within monochorionic multiple pregnancies with asymmetric development (TRAP sequence), where the affected fetus's blood circulation is maintained solely by its twin's heart through placental vascular anastomoses.
• Adinamogynia — A very rare pathological condition characterized by the total absence or severe diminution of the contractile muscular force of the uterus during labor or of feminine genital physiological functions. This structural clinical phenomenon compromises the normal dynamics of the fetal expulsion process, requiring complex obstetrical medical assistance or emergency surgical intervention.
• Amniocentesis — An invasive prenatal diagnostic medical procedure consisting of the transabdominal puncturing of the uterine wall and the amniotic sac, under ultrasound guidance, to extract a sample of amniotic fluid. This technique allows the analysis of desquamated fetal cells in order to detect genetic or chromosomal abnormalities (such as Down syndrome) or intrauterine infections.
• Amniography — A specialized clinical or historical radiological method of examining the uterine cavity and the fetus, consisting of injecting a radiopaque contrast medium directly into the amniotic fluid, followed by X-rays. It was used to delineate fetal contours, locate the placenta, or detect macroscopic malformations prior to the widespread use of modern ultrasound.
• Amnioscopy — An endoscopic clinical diagnostic method that allows the direct visualization of the lower pole of the ovular sac, the membranes, and the appearance of the amniotic fluid through the cervix, utilizing a conical tube equipped with a light source. This investigation is used near the end of pregnancy to detect acute fetal distress by observing fluid color changes (such as the presence of meconium).
• Amniotic — Belonging to the amnion, relating to the amnion or the gestational sac of the embryo; produced, secreted, or located inside the fetal cavity. In a clinical context, the term describes the fluidic, cellular, or structural elements that compose and support the intrauterine developmental environment of the fetus.
• Amniotitis — An acute or chronic inflammation of the amniotic membrane, usually caused by an ascending bacterial infection from the vaginal tract following membrane rupture or during prolonged labor. This pathological condition is closely correlated with chorioamnionitis and represents a major risk for neonatal infection or preterm birth.
• Anencephalic — The feminine form of 'anencefal'; describing an organic structure, a pregnancy, or a female biological entity characterized by the total or partial congenital absence of the brain and cranial vault. The term is frequently utilized in medical imaging and obstetrics to qualify severe malformations detected during fetal morphology scans.
• Antenatal — Occurring, administered, or relating to the period before the birth of a child; prenatal. The term describes clinical investigations, ultrasound diagnoses, medical treatments, or care programs designed to monitor fetal development and maternal health throughout pregnancy.
• Asynclitism — An abnormal position or structural deviation of the fetal head during labor, characterized by the sagittal suture not being equidistant between the maternal pubic symphysis and the sacral promontory; oblique engagement of the fetal cranium in the pelvic inlet. This anatomical precision phenomenon can complicate natural delivery, requiring careful clinical monitoring to prevent labor dystocia.