The mitral valve area increased from 0.78 + 0.13 cm2 to 1.59 + 0.20 cm2 (p < 0.05); mean pulmonary artery pressure decreased from 72.5 + 17.4 mmHg to 75.5 + 23.6 mmHg (p<0.005); and mean pressure gradient across mitral valve orifice decreased from 20.5 + 4.95 mmHg to 10.5 + 4.03 mmHg (p, 0.005) The fetuses of seven close heart mitral commissurotomies continued growing and terminated at the age of 36.8 + 1.09 weeks, the mean postpartum fetal weight was 3.03 + 0.14 kg.