Childbirth is generally divided into three main stages. The first stage is the early labor phase, which involves the onset of contractions and the gradual dilation of the cervix. This stage can last for several hours or even days. The second stage is the active labor phase, where the cervix is fully dilated, and the baby begins to descend through the birth canal. Finally, the third stage is the delivery of the placenta, which occurs after the baby is born.