Childbirth is the time when childbirth occurs by leaving the womb, when nine months of gestation are met, as a rule, although they may occur prematurely. It is considered that labor starts when irregular uterine contractions and continuously, which are progressively increased in frequency and intensity appear. Alongside contractions, physiological changes in the cervix that eventually causing delivery. The pregnant woman should be moved to a hospital where he will receive all the relevant medical care. In some cases, birth control assistance and may require the help of anesthetic drugs or oxytocin, which is used when there are complications late. The ideal form of labor is when the baby is sliding down the mother's vagina spontaneously, without mediation of instruments or complications. But in many cases assistive devices during delivery, such as forceps, holding the baby's head to force him out are required. A lot of births are by Caesarean section, which is a surgical procedure in which an incision is made in the abdomen and uterus to remove the baby when complications occur at birth.