[Hydatidiform mole. Clinical aspects, incidence and risk factors].

From September 1st, 1992, to August 31st, 1994 35 patients with molar pregnancy were studied comparing them with 70 patients with normal pregnancy attended in the Hospital General de Zona 1 IMSS San Luis Potosí with the purpose of establishing the incidence of molar pregnancy to know the risk factors and to study the clinical aspects of it. The found incidence was: 1 molar pregnancy for each 415 deliveries, 22.85% of the mole patients were in a low socioeconomic position against 8.57% of the control group, suggesting that such condition is a risk factor. The average age was 26.28 years old in the mole patients and 26.42 years old in the control group. There were no differences in the number of first-pregnancy in both groups: 17.14% against 18.57% in the control group. The predominant symptoms and signs were: bleeding, vesicle expulsion, nausea and vomit. In all of them, a uterine curettage was performed, four needed blood transfusion, one needed subsequent curettage, there were no deaths. It is concluded that the incidence is similar to reports of other national authors, the low socioeconomic level is a factor for the aparition of this disease and it requires a precocious diagnostic to avoid complications.