Abstract
Thyroid stimulating hormone (TSH) determinations before and after thyrotropin-releasing hormone (TRH) stimulation were obtained in 834 infertile women, from 1982 until 1985. Thyroid function disturbances were seen in 20% of the women, in accordance with the prevalence in South Germany. Postcoital tests were significantly poorer in women with subclinical hypothyroidism than in euthyroid patients. Spontaneous conception was more frequent in euthyroid (16%) than in hypothyroid (6%) women. During the same period, prolactin was determined after TRH stimulation in the early follicular phase and after metoclopramide stimulation in the luteal phase, in 759 women. The pregnancy rate was not improved by administration of dopamine agonists in women with an exaggerated response to TRH or metoclopramide. Our results suggest that subclinical hypothyroidism as well as disorders of prolactin secretion may play a role in infertility. The TRH test is proposed to rule out thyroid dysfunction. Neither the TRH nor the metoclopramide test was useful for the prognostic differentiation of prolactin secretion disorders.
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