A–Z Glossary

Single deepest vertical pocket

The single deepest vertical pocket is an ultrasound measurement of the deepest amniotic fluid pocket without fetal parts or umbilical cord.

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Oligohydramnios and polyhydramnios explained

Oligohydramnios and polyhydramnios explained

Why amniotic fluid matters Amniotic fluid is not simply “water around the baby.” In early pregnancy, it is largely derived from maternal plasma and fluid movement across fetal membranes. Later, fetal urine becomes a major contributor, while fetal swallowing, lung fluid movement, membrane exchange, and placental dynamics help regulate the total volume. Because production and […]