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Postterm Pregnancy
OB/GYN
Question | Answer |
---|---|
what is prolonged or postterm pregnancy? | pregnancy persisting beyond 42 weeks from onset of last menstrual cycle |
incidence of postterm pregnancy? | 6-12% |
Why is perinatal mortality 2-3 times higher in prolonged gestation? | Fetal post maturity syndrome. 20-30% growth restricted fetus in utero. placenta ages and infarcts>>insufficient o2/nutrient diffusion |
Etiology of postterm pregnancy? | unknown. -common association with anencephalic fetus -placental sulfatase deficiency -extrauterine pregnancy |
Antepartum Management of postterm? | if gestational age is definitely 42 weeks, fetal head is in pelvis, cervix favorable>>induce |
Antepartum 42 weeks, unripe cervix? | twice weekly NST and biophysical profile. wait for cervix to ripen deliver if AFI <5 or spontaneous fetal heart rate decelerations on NST |
Antepartum uncertain gestational age? | expectant approach |
Intrapartum postterm management? | continuous electronic fetal monitoring. -pt in left decubitus -rupture membranes early place internal electrodes and assess amnion fluid color C/S if fetal distress |