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

1. Conception occurs when the sperm fertilizes an egg cell. Ovulation is the release of an egg from ovaries, it occurs when follicle ruptures and then release the oocyte ovarian cells.
 Menstruation is the monthly discharge of blood which comes from the inner lining of uterus, it occurs after every twenty eight days to women who have regular periods, and other 32 days. Labor is the process of delivering a baby, membranes, placenta and umbilical cord from the uterus to the vagina to outside.
 2. In labor "pushing" stage becomes the second stage. The third begins after birth of the baby and ends when placenta is removed.
3. Fatigue is truly a symptom of pregnancy.
4. An egg cell and sperm cell join together to form a zygote. Placenta is formed in allantois and chorion. Blastocyst forms the outer layer of placenta. 5. A week after fertilization, blastocysts attaches to the lining of uterus. Fallopian tube is where the fertilized egg passes through to the uterus. Ovum is the fertilized egg. Ovaries is where the eggs are attached before fertilization.
 6. It is true that the embryo receives nutrients from the placenta.
7. The length of pregnancy is divided into three trimesters. The first trimester takes from first day you are pregnant to the 13th week, the second takes place from 14th to 27th while the third is from 28th to term which is 40 weeks. It either may be less or above two weeks.
8. The first system to develop in unborn baby is the nervous system. Urinary tract is developed from third week of embryonic life from ureters and kidney which is from bladder and urethra.