Gestation

The gestation period for the African bush elephant is about 669 days, whereas that for a guinea pig is only about 70 days.

The gestation period of an elephant is almost two years.

The gestation period of a rhino is about 16 months.

A giraffe's gestation period can last for up to 160 days.

Blood flow through the umbilical cord increases significantly throughout gestation.

Amniocentesis is usually conducted at 16 weeks gestation and involves taking fluid from the amniotic sac surrounding the developing fetus by inserting a hollow needle into the mother's uterus.

At the end of a gestation period usually lasting from two to four weeks, the pregnant male’s abdominal area begins to undulate rhythmically, and strong muscular contractions eject from a few dozen to as many as 1,000 fully formed baby seahorses into the surrounding water.

It was to a conversation with another friend who had for many years been familiar with all my writings during the period of their gestation, just as I had been with his.