present evidence suggests that the maturation of fetal lung is accelerated in severe preeclampsia and placental insufficiency and is delayed in maternal diabetes ( class b ) , rh-isoimmunization and anencephaly , and it is considered that in spontaneous premature delivery surfactant production in fetal lung is not accelerated but surfactant excretion from fetal lung into amniotic fluid is enhanced by effect of uterine relaxant such as isoxsuprine or terbutaline .
C1517163
fetal
C0015965
fetal