Males and females segregate during the time of gestation and parturition. They control spermatogenesis and the ovarian cycle, parturition, lactation, and maternal behaviour. Uterine tears often occur a few days post parturition. As well as its function in parturition, Prostaglandin E2 is vital for fetal lung maturation. Pictures of caesarian section of a euthanized ewe, five days after parturition signs. Postnatal care is care provided to the mother following parturition. After copulation, females act aggressively towards males, especially when close to parturition. Weaning is recommended at 3 to 4 weeks after parturition. In sheep, it can go to term, with mammary preparation to parturition, and expulsion efforts. Pregnant females isolate themselves in thickets as parturition approaches. Savaging behaviour usually occurs during the first two days after parturition. Females become pregnant again soon after parturition. Alaotra gentle lemur, birth (parturition) occurs over a six-month period. He went on to employ ether as a general anesthetic for limb amputations and parturition. The peak periods for milk production occur after four to six weeks of parturition (kidding).