Into how many trimesters is pregnancy divided?
AnswerThree
Each trimester is roughly three months.
Health · Facts & stats
Pregnancy facts & stats
7 fact-checked facts about pregnancy science and the biology of birth, each with the reason behind it. 5 more are in today's round and join this page after it closes.
The basics
What is a doctor specializing in pregnancy and childbirth called?
AnswerAn obstetrician
Obstetrics is the field of pregnancy and birth care.
Going deeper
Which hormone do home pregnancy tests detect?
AnswerhCG
Human chorionic gonadotropin rises early in pregnancy.
Which organ connects to the baby through the umbilical cord?
AnswerThe placenta
The placenta passes oxygen and nutrients to the fetus.
The fluid-filled sac around a fetus is called what?
AnswerThe amniotic sac
Amniotic fluid cushions the baby.
Expert level
Which land mammal has the longest pregnancy, about 22 months?
AnswerElephant
African elephants carry calves for about 22 months.
Which North American mammal has a gestation of only about 12 to 13 days?
AnswerVirginia opossum
Opossum young finish developing in the pouch.
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