Pregnancy Snapshot

Birth

For a brief summary of development events during various
stages of pregnancy, choose any age* range from the drop-down menu.

(*Ages are referenced from time of conception or fertilization,
not from the beginning of your last menstrual period. One month equals 4 weeks.)

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Movie clip from The Biology of Prenatal Development. Buy Now!


Breathing motions occur about 70% of the time. Thighs are about three inches long (about 7Â½ cm). • Baby's foot is now about three inches long (about 7Â½ cm). • Baby sometimes drinks 450cc (or 15 oz) of amniotic fluid each day. • The heart beats 54 million times before birth. • Time to be born! • Air breathing begins.

*All prenatal ages are referenced from the time of fertilization (or conception).
One month is defined as exactly four weeks.