بررسی اثر سقط خودبخودی بر روی پیش آگهی حاملگی بعدی

In a historical cohort study we evaluated the effects of spontaneous abortion on subsequent pregnancy outcome. 1693 pregnant women were classifield in three groups: 1100: without any prior pregnancy, group 1 550: with history of one spontaneous abortion (G2A1), group 2 43: with two or more prior spontaneous abortions and no other prior pregnancies, group 3. We collected data through interview, patient's records and physical examination. We matched the patients according to their age subgroups, history of chronic disease, drug administration and radiation during current pregnancy and familial marriage. Then we compared adverse outcome of present pregnancy in group 1 and 2 with the women without prior pregnancy. We analysed the data with Chi-square and Fisher's exact methods. In this study we concluded that history of one spontaneous abortion had no effect on subsequent pregnancy except on prolonged ROM (P<0.000), but history of two or more abortions significantly affects occurrence of stillbirth (RR=29, P=0.003) and placenta previa (RR=8.5, P=0.03). These findings suggest that pregnant women with history of two or more spontaneous abortion need special prenatal care.