Question

Use what you know about the first twelve weeks from conception to birth to answer the following questions.

The time period from conception to birth is called
.

It is further divided into three periods called
.

How many sperm cells can fertilize an egg?

The fusing of an egg and sperm forms a
.

Answer 1

1. The time period from conception to birth is called pregnancy (the prenatal period or gestation).

2. It is further divided into three periods called trimesters.

3. How many sperm cells can fertilize an egg? One.

4. The fusing of an egg and sperm forms a zygote.