(prolonged)Post-termpregnancy
Post-term（prolonged） pregnancy
definitionPost-term pregnancy, extends beyond 294 daysor 42 weeks from the first dayof theLMP.Increased perinatal morbidity and mortality havebeen documented when pregnancy extendsbeyond 42 weeks' gestation. The incidence ofcongenital anomalies is also increased inpostdatepregnancies
definition ◼ Post-term pregnancy, extends beyond 294 days or 42 weeks from the first day of the LMP. Increased perinatal morbidity and mortality have been documented when pregnancy extends beyond 42 weeks' gestation. The incidence of congenital anomalies is also increased in postdate pregnancies
EpidemiologyTheincidenceof posttermpregnancy rangesbetween 7%and 12%ofallpregnancies.Approximately 4% of all pregnancies extendbeyond 43weeks,and recurrence riskis50%forsubsequentpregnancies
Epidemiology. ◼ The incidence of postterm pregnancy ranges between 7% and 12% of all pregnancies. Approximately 4% of all pregnancies extend beyond 43 weeks, and recurrence risk is 50% for subsequent pregnancies
Diagnosis1.post-term pregnancy must be based on anaccurate estimate of gestational age. 2.Obstetric dates should be considered valid iftwo or more of the following criteria are met:certain LMP; positive urine pregnancy test 6weeksfromtheLMP:
Diagnosis ◼ 1.post-term pregnancy must be based on an accurate estimate of gestational age. ◼ 2.Obstetric dates should be considered valid if two or more of the following criteria are met: certain LMP; positive urine pregnancy test 6 weeks from the LMP;
3.fetal heart tone detected with Dopplerultrasonographic testing at 10 to 12 weeks'gestation orwith DeLee's stethoscope at 18 to 20 weeks'gestation;fundal height at the umbilicus at 20 weeks'gestation;pelvic examination consistent with LMP before 13weeks'gestation; and ultrasonographic dating by lengthbetween 6 and 12 weeks'gestation or by biparietaldiameter before 26 weeks'gestation.The best estimates of gestational age are based on asmany criteriaas possible
◼ 3.fetal heart tone detected with Doppler ultrasonographic testing at 10 to 12 weeks' gestation or with DeLee's stethoscope at 18 to 20 weeks' gestation; fundal height at the umbilicus at 20 weeks' gestation; pelvic examination consistent with LMP before 13 weeks' gestation; and ultrasonographic dating by length between 6 and 12 weeks' gestation or by biparietal diameter before 26 weeks' gestation. ◼ The best estimates of gestational age are based on as many criteria as possible