Objectives: To determine Doppler fetal pulmonary arterial trunk acceleration/deceleration times (AT/DT) in relation with gestational age, and if there would be a value of such index that would indicate pulmonary maturity with acceptable predictability. Design: Prospective and descriptive study.Setting: Instituto Latinoamericano de Salud Reproductiva, Lima, Peru, a teaching institution. Participants: Healthy women with single pregnancy. Methods: During 2007 and 2008, 79 pregnant women with 26 to 39 weeks healthy singleton pregnancies were studied. AT and DT mean values were measured in the fetal pulmonary arterial trunk using Doppler ultrasound and related to gestational age (GA). Results had statistical analysis to determine a cut value for pulmonary maturity, considering fetuses over 37 weeks have pulmonary maturity and none of the newborns studied had respiratory distress. Main outcome...

Objectives: To determine Doppler fetal pulmonary arterial trunk acceleration/deceleration times (AT/DT) in relation with gestational age, and if there would be a value of such index that would indicate pulmonary maturity with acceptable predictability. Design: Prospective and descriptive study.Setting: Instituto Latinoamericano de Salud Reproductiva, Lima, Peru, a teaching institution. Participants: Healthy women with single pregnancy. Methods: During 2007 and 2008, 79 pregnant women with 26 to 39 weeks healthy singleton pregnancies were studied. AT and DT mean values were measured in the fetal pulmonary arterial trunk using Doppler ultrasound and related to gestational age (GA). Results had statistical analysis to determine a cut value for pulmonary maturity, considering fetuses over 37 weeks have pulmonary maturity and none of the newborns studied had respiratory distress. Main outcome...