Pregnancy Diagnostics Glossary

Ultrasound measurement of fluid collection behind fetal neck used in Down syndrome screening.

Condition characterized by decreased amniotic fluid volume, associated with fetal abnormalities and pregnancy complicati...

Pregnancy-associated plasma protein A, a biomarker measured in first-trimester screening for chromosomal abnormalities.

Abnormal placental implantation where placental tissue covers or lies near the cervical opening.

Premature separation of the placenta from the uterine wall before delivery, causing maternal and fetal complications.

Sonographic classification system describing placental maturation based on calcification and textural changes.

Sonolucent spaces within the placenta representing areas of slow maternal blood flow.

Rare placental disorder characterized by enlarged, edematous villi resembling partial molar pregnancy.

Sonographic measurement of placental depth, with abnormal values indicating potential complications like hydrops or infe...

Excessive accumulation of amniotic fluid during pregnancy.

Final risk assessment after combining screening test results with maternal age and other factors in prenatal screening.

Pregnancy-specific hypertensive disorder characterized by high blood pressure and proteinuria after 20 weeks gestation.

Rupture of fetal membranes before 37 weeks of gestation and prior to the onset of labor, requiring careful management to...

Premature rupture of membranes occurring before the onset of labor, requiring assessment of gestational age and infectio...

Second-trimester maternal serum screening test measuring four biochemical markers.

Systolic to diastolic ratio, Doppler measurement reflecting vascular resistance in fetal and placental circulation.

Neural tube defect where spinal cord and vertebrae fail to develop properly.

Severe form of twin-to-twin transfusion syndrome where the donor twin becomes trapped against the uterine wall.

Bleeding between the chorion and uterine wall, visible on ultrasound as a fluid collection in early pregnancy.

Laboratory testing for maternal infections that can cause congenital abnormalities: Toxoplasmosis, Other, Rubella, Cytom...

Chromosomal condition with extra copy of chromosome 21, causing Down syndrome.

Ultrasound technique measuring blood flow in umbilical arteries to assess fetal well-being and placental function.

Fluid-filled structure within the umbilical cord that may indicate underlying fetal abnormalities.

Entanglement of the umbilical cord that can compromise fetal circulation if tightened.