Reproductive Endocrinology · Luteal Phase

Follicular phase treatment of luteal phase dysfunction

Hodgen GD, diZerega GS

Published April 1981 Fertility and Sterility, 35(4), 428-432
DOI 10.1016/s0015-0282(16)45438-5 PMID 6783446
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RRM Academy Synopsis

Early FSH treatment partly preserved luteal function in monkeys

Early FSH treatment appears to partly preserve luteal function in monkeys with induced FSH deficiency. This 1981 experiment used 10 adult rhesus monkeys in two groups of five. With the lower dose of the FSH-suppressing fluid, each cycle had one timely ovulation. In the higher-dose group, none of the monkeys ovulated.

Key Findings

  • In the five monkeys given low-dose follicular fluid plus FSH-rich hMG, surgical inspection on cycle day 16 confirmed single ovulations on cycle days 13 to 15.
  • The low-dose group's intermenstrual interval was 26.3 ± 2.4 days (mean ± standard error). Its initial luteal progesterone rise resembled normal ovulatory cycles, and late luteal progesterone stayed below normal.
  • In the five monkeys given high-dose follicular fluid plus hMG, FSH stayed below normal and estradiol fell markedly (P < 0.05). No corpus luteum developed, and progesterone stayed at basal levels.
  • Estradiol also declined in the low-dose group (P < 0.05), yet stayed significantly higher than in the high-dose group (P < 0.05).
  • Radioimmunoassay LH levels were unaffected by follicular fluid in the low-dose group and not significantly affected in the high-dose group.

Interpretation

The study is a small animal experiment with 10 adult rhesus monkeys, five per dose group. The paper reports no untreated group and no hMG-only group. Comparisons with follicular fluid alone rest on the authors' earlier reports. The researchers induced the FSH deficiency themselves, so the model resembles spontaneous luteal phase dysfunction in women and monkeys without matching it exactly. Fertility was not measured. The authors say they cannot claim the corpus luteum returned to normal. That would take restored hCG responsiveness and normal fertility rates. The authors say clinical investigations are required to evaluate this approach for human infertility linked to some types of luteal phase dysfunction.

RRM Context

The paper reports that early follicular-phase FSH events help determine how the corpus luteum later develops and functions. Low progesterone after ovulation can therefore lead back to the follicular phase as a place to look for the cause. Restorative reproductive medicine reads the whole cycle as one system. Fertility awareness charting records how long the luteal phase lasts.

Abstract

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.

Topics

By this author

Related research

Reproductive Endocrinology › Luteal Phase › Luteal Phase Deficiency · Menstrual Cycle › Cycle Disorders › Ovulatory Disturbances · Therapeutics › Hormonal Agents › Gonadotropins
PMID 6783446 6783446 DOI 10.1016/s0015-0282(16)45438-5 10.1016/s0015-0282(16)45438-5 Hodgen et al. 1981, Hodgen 1981

Cite this article

Hodgen, G. D., & diZerega, G. S. (1981). Follicular phase treatment of luteal phase dysfunction. Fertility and Sterility, 35(4), 428-432. https://doi.org/10.1016/s0015-0282(16)45438-5