A typical human pregnancy is made up of ___ trimesters:

The only way to become pregnant is to have sex

The male reproductive cell is called:

The female reproductive cell is called:

An embyro is:

A fetus is:

What is the name for the the sudden tightening of the muscles in the uterus that occur shortly before a baby is born?

What purpose do contractions serve?

What is the name of the protective fluid that surrounds a fetus during its development?

What is the placenta?

What connects the placenta to the mother's body?

The gender of the baby will be determined by:

One of the earliest signs that a woman is pregnant is:

When a sperm fertilizes an egg, their combined chromosomes add up to:

After fertilization occurs, what does the egg do?

If someone is sexually active, what can they do to protect themselves against pregnancy?

Is there any type of birth control (contraception) that is 100% effective at preventing pregnancy?

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