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[Evaluation of ovulation induction in infertile women who are underweight].

The induction of ovulation in 74 underweight normally menstruated sterile women were analyzed with regard to the body mass index (BMI). The underweight patients presented 10.5% of the treated anovulatory women among them 4.8% presented serious weight loss. The concentration of serum gonadotropins and estradiol just before treatment did not allow to anticipate the results of therapy. The interesting observation concerned the cases with low concentration of serum FSH and LH which was more frequently found in nonresponding patients. The ovulatory ratio was not high and was comparable in all groups but pregnancy ratio in the responders was 1.5 times higher in slightly underweight patients. Among the nonresponders more than half of them demonstrated follicular growth confirmed by USC, serum estradiol and mucus viscosity.