Once an egg cell is fertilized by sperm, the cell
Then, as the embryo develops, it receives nourishment and eliminates wastes by transferring substances from its blood to its
mother's blood.
A.
begins to divide and implants itself in the wall of the uterus
B.
remains in the uterus without dividing for several months
c. travels back to the ovaries until the fetus is developed
D. becomes a fetus immediately and exits the womb