How does the human embryo grow and develop?
The human embryo does not begin to exist in the mother's womb.
Fertilization is one method of reproducing new human beings, and it
takes place naturally in the woman's fallopian tube. The new human
embryo then travels through the fallopian tube for about a week and
then implants into the mother's womb. The embryonic period begins
at fertiization and ends at the end of 8 weeks. The fetal period
goes from the beginning of 9 weeks until birth.