1. occurs when sperm fertilizes an egg cell.
menstruation
conception
ovulation
labor
2. which stage of labor is called the "pushing" stage?
first
second
third
fourth

3. fatigue is a symptom of pregnancy.
true
false

4. an egg cell and sperm cell join together to form a zygote
placenta
blastocyst
fetus

5. a week after fertilization, a blastocyst attaches to the lining of the
ovaries
uterus
fallopian tubes
ovum

6. the embryo receives nutrients from the placenta.
rue
false

7. how many trimesters is the length of pregnancy divided into?
one
two
three
four
8. the first system to develop in the unborn baby is the
nervous system
respiratory system
urinary system
endocrine system