Human Pregnancy and Birth

Once the zygote implants in the uterine wall, embryonic and fetal development continue through three trimesters to birth.

Labor and birth are divided into three stages: the dilation of the cervix, the delivery of the baby, and the expulsion of the placenta.

Contraception, also known as birth control, is methods used to prevent pregnancy; some of these methods are more successful than others.

Infertility, or the ability to conceive, can be treated by assisted reproductive technologies which can aid conception.