Follicular phase treatment of luteal phase dysfunction.

Previously, we demonstrated that selective suppression of serum follicle-stimulating hormone (FSH) in monkeys treated with charcoal-extracted porcine follicular fluid (pFF) in the early follicular phase induced luteal defects resembling those which occur spontaneously in women and monkeys. Here, we assessed whether luteal phase defects arising in association with induced FSH deficiencies during the early follicular phase can be treated by early FSH therapy. Rhesus monkeys were treated with pFF and human menopausal gonadotropin (hMG) (FSH:luteinizing hormone [LH], 3:1) on cycle days 1 to 3 or day 4, respectively. Daily femoral blood samples were analyzed for LH, FSH, and estradiol by radioimmunoassay. In the monkeys treated with the pFF-hMG combination, a single ovulation was uniformly noted at laparoscopy, and initial luteal phase elevations in serum progesterone levels were nearer those of normal ovulatory cycles than after pFF alone. These results suggest that FSH/LH treatment in the early follicular phase compensated, in part, for the pFF-induced deficiency in endogenous FSH levels.