Embryogenically, congenital hepatic fibrosis is due to malformation of the duct plate, a round structure appearing in the eighth week of gestation that is formed by primitive hepatocytes, which differentiate into cholangiocytes.
Around the 24th day of gestation, the foramen cecum, a thin, flask-like diverticulum of the median anlage develops.
Rupture of the fetal membranes before 24 weeks of gestation with loss of amniotic fluid markedly decreases the baby's chances of survival, even if the baby is delivered much later.
Andy Mayberry (born 1970), member of the Arkansas House of Representatives; author of the state law banning abortion after twenty weeks of gestation; resident of Hensley
Metabolic imprinting, the phenomenon by which the metabolism of the developing fetus may be "programmed" during gestation
In May 1982, California Attorney General George Deukmejian stated the gestation limit of the 1967 California abortion law was considered unenforceable because of conflicts with the 23-week Roe v. Wade ruling in 1973, but fetuses could be individually examined to determine viability, which was the legal limit.
The title was chosen late in the poem's gestation; it refers to the youngest of the three Parcae (the minor Roman deities also called The Fates), though for some readers the connection with that mythological figure is tenuous and problematic.
In a multiple gestation pregnancy, the cause of polyhydramnios usually is twin-twin transfusion syndrome.
Historical figures who were born prematurely include Johannes Kepler (born in 1571 at 7 months gestation), Isaac Newton (born in 1642, small enough to fit into a quart mug, according to his mother), Winston Churchill (born in 1874 at 7 months gestation), and Anna Pavlova (born in 1885 at 7 months gestation).
Their Birth Series, depicting the processes of gestation and delivery, was displayed at the 1939 New York World's Fair and may be seen at the Science Museum in Boston, Massachusetts.