Gonadotropin in follicular phase in women with luteal phase defect.

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Abstract
Serum FSH and LH in women with luteal phase defect were measured. Their serum FSH and LH were lower than those in normal women and higher than those in women with amenorrhea. Administration of clomiphene citrate to the women with luteal phase defect were effective in 2/3 of the cases. These results are consistent with the hypothesis that a relative deficiency of FSH during the follicular phase results in diminished follicular development and subsequent inadequate corpus luteum maintenance.