The perinatal period is the time from 28 weeks gestation to one week after birth. The following are life-threatening health conditions that take place during the perinatal period: fetus and newborn affected by maternal factors and by complications of pregnancy, labor, and delivery; disorders related to length of gestation and fetal growth; birth trauma; respiratory and cardiovascular disorders specific to the perinatal period; infections specific to the perinatal period; hemorrhagic and hematological disorders of fetus and newborn; transitory endocrine and metabolic disorders specific to fetus and newborn; digestive system disorders of fetus and newborn; conditions involving the integument and temperature regulation of fetus and newborn; other diseases originating in the perinatal period.

The period shortly before and after birth.

Stage of newborn baby