Perinatal mortality in term and post-term births.
The hospital records were reviewed of 64 infants born at or after 37 weeks of amenorrhea who suffered perinatal mortality during a 3-year period at Boston Hospital for Women. The most frequent cause of death of a term or post-term infant was extrinsic perinatal hypoxia, and the second most common was lethal malformation. Half the deaths of term infants occurred ante partum. Further reduction in perinatal mortality for this group may require extension of antepartum fetal monitoring techniques to all pregnancies. Intrapartum loss was rare, occurring at a rate of 0.43 per 1000 for infants delivered at term, and not at all among post-term infants. Massive aspiration of amniotic sac content was found frequently in antepartum and intrapartum death, and death from meconium aspiration occurred in neonates despite intrapartum monitoring and early suctioning of the pharynx and trachea. Asphyxiated term and post-term infants consistently pass meconium. Prevention of all deaths from meconium aspiration, thus, will require the prevention of asphyxia. A goal for obstetric care is that no fetus alive in utero at 37 weeks of amenorrhea should subsequently die in the perinatal period, provided no lethal malformation is present.
D005260:Female; D005313:Fetal Death / Q000209:etiology*; D005317:Fetal Growth Retardation / Q000401:mortality; D005311:Fetal Hypoxia / Q000401:mortality; D005865:Gestational Age; D006801:Humans; D007226:Infant Mortality; D007231:Infant, Newborn; D008404:Massachusetts; D011015:Pneumonia, Aspiration / Q000401:mortality; D011247:Pregnancy; D011273:Pregnancy, Prolonged; D011295:Prenatal Care / Q000592:standards; D011296:Prenatal Diagnosis