[Procoagulant properties of the amniotic fluid. IV. The acceleration time of thromboplastin in the amniotic fluid in pathologic pregnancy]. / Propiedades procoagulantes del líquido amniótico. IV. El tiempo de aceleración de tromboplastina en líquido amniótico en el embarazo patológico.

With the purpose of know the behaviour of the thromboplastic acceleration time in amniotic fluid, there were analized 390 amniotic fluids, 241 from normal pregnancies and 149 from abnormal pregnancies, of these, 52 from diabetic women, and 97 from hypertensive women. It was found an important increase in T.A.T. with the progress of pregnancy and their usefulness as fetal lung maturity test. It was concluded, that this method is easy, cheap, and highly specific, so it can be the first election test for determination of fetal lung maturity in low resources Obstetric Centers.