Pregnancy

5. This begins to form and is rich in blood vessels and attaches to the wall of the uterus.
7. the lining of the uterus has thickened enough to provide a place for the zygote to attach itself and continue to grow.
8. when sperm reaches the fallopian tubes, it may penetrate and fertilize the ovum.
10. division The zygote is still in the fallopian tubes and begins to divide into two cells,then rapidly into four cells and then into 8 cells and so on.
12. about every 28 days when an ovum is released by one of a women's two ovaries.
14. the organ in a woman's body in which a baby develops during pregnancy.

1. the federalized egg
2. a male cell
3. tube- Connects the ovary to the uterus.
4. sac a sac that fills with fluid and surrounds the embryo.
5. Development- The baby's development during a pregnancy.
6. The third and final stage the developing baby is called what?
7. the inability to become pregnant
9. tube after 27 days, a tube in the back of developing baby that will become the brain and spinal cord, closes.
11. the developing baby from about the third week of pregnancy to the eight week.
13. an egg cells.