We report inhibin alpha- and beta A-subunit gene expression in the human corpus luteum and placenta using human alpha-subunit and bovine beta A-subunit nucleic acid probes. In addition, we have demonstrated the presence of immunoreactive and bioactive inhibin in human corpora lutea. Our findings suggest that this tissue is a significant source of inhibin during the luteal phase of the normal human menstrual cycle.
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Davis et al. (1987) studied this question.