A sperm cell from a male meets an egg cell from a female
Fertilization happens when the sperm enters the egg
The fertilized egg becomes a zygote
The zygote divides into more cells
The cells form an embryo
The embryo attaches to the wall of the uterus
The embryo grows into a fetus
The fetus develops organs and body parts
Pregnancy continues for about 9 months
Labor begins when the baby is ready to be born
The baby passes through the birth canal or is delivered by cesarean section
The baby is born