Postterm pregnancy Luo Xiaodong 1
1 Postterm pregnancy Luo Xiaodong
Definition prolonged pregnancy,post-dated pregnancy Pregnancy that has reached 42 weeks(294 days)of completed gestation from the first day of the last menstruation or 40 weeks'gestation from the time of conception. Menstrual cycle is normal 28~30 days The frequency of postterm pregnancy is 5~10% 3
2 Definition prolonged pregnancy, post-dated pregnancy Pregnancy that has reached 42 weeks(294 days) of completed gestation from the first day of the last menstruation or 40 weeks’ gestation from the time of conception. Menstrual cycle is normal 28~30 days The frequency of postterm pregnancy is 5~10%
Etiology is not known,maybe correlate to fetal adrenal cortex Surmise the mechanism for the initiation of delivery has some abnormalities PG (prostaglandin)and E deficient,P increase Fetal malformation 3 Anencephalic fetus,hypoplasia of adrenals 3
3 Etiology is not known, maybe correlate to fetal adrenal cortex Surmise the mechanism for the initiation of delivery has some abnormalities PG（prostaglandin） and E deficient, P increase Fetal malformation Anencephalic fetus, hypoplasia of adrenals
Pathology Placental function is sufficient (90%) Fetus growth,macrosomia,shoulder dystocia Skull calcified Placental function is insufficient 3 Three stage 3 Postmaturity syndrome(PMS):infants are withered,meconium-stained,fragile,with long nails and peeling skin Placenta:thinner,infarcts,fibrin deposition and calcification 4
4 Pathology Placental function is sufficient (90%) Fetus growth, macrosomia, shoulder dystocia Skull calcified Placental function is insufficient Three stage Postmaturity syndrome(PMS): infants are withered, meconium-stained, fragile, with long nails and peeling skin Placenta: thinner, infarcts, fibrin deposition and calcification
Complication Perinatal morbidity rates increased sharply Fetal distress meconium aspiration syndrome(MAS),asphyxia Trauma:shoulder dystocia Mental retardation and neurologic sequelae Mother: 3 manipulative delivery is increased
5 Complication Perinatal morbidity rates increased sharply Fetal distress meconium aspiration syndrome(MAS), asphyxia Trauma: shoulder dystocia Mental retardation and neurologic sequelae Mother: manipulative delivery is increased