The authors report the results of a study of 40 patients with normal serum prolactin levels who were treated with bromocriptine for sterility secondary to ovulatory disturbances. This therapy restored normal ovulatory cycling in 62.5% of cases with subsequent pregnancy in 27.5% of cases, in particular in patients with primary infertility of long duration. The course of "latent" hyperprolactinemia (peak of TRH, repeated dosages of PRL) was discovered in only one out of two patients who responded to treatment. In patients with "non-latent" normal serum prolactin levels, bromocriptine's mechanism of action is not always clear.
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