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Transient hyperprolactinemia is associated with a midcycle luteinizing hormone surge
1Department of Obstetrics and Gynecology, University of Toronto, Ontario, Canada.
Fertility and Sterility
|November 1, 1990
Summary
In vitro fertilization (IVF) patients with a luteinizing hormone (LH) surge showed higher prolactin (PRL) levels. This suggests a link between the midcycle gonadotropin surge and transient hyperprolactinemia.
Area of Science:
- Reproductive Endocrinology
- In Vitro Fertilization (IVF)
- Hormonal Regulation
Background:
- Midcycle gonadotropin surges are critical for ovulation.
- The relationship between luteinizing hormone (LH) and prolactin (PRL) during these surges requires further elucidation.
- Understanding hormonal interplay is key in assisted reproductive technologies.
Purpose of the Study:
- To investigate the association between LH surge occurrence and serum PRL concentrations in IVF patients.
- To explore potential mechanisms linking gonadotropin surges and PRL levels.
Main Methods:
- Retrospective analysis of IVF patient cycles.
- Comparison of serum PRL levels in cycles with and without spontaneous LH surges.
- Statistical analysis to determine significant differences.
Main Results:
- IVF cycles with an LH surge exhibited significantly higher serum PRL concentrations compared to cycles without an LH surge.
- Findings support concomitant LH and PRL release during the midcycle gonadotropin surge.
- Evidence suggests estrogen sensitization of pituitary lactotropes contributes to transient hyperprolactinemia.
Conclusions:
- A spontaneous LH surge in IVF patients is linked to elevated serum PRL levels.
- Estrogen's role in sensitizing pituitary lactotropes may explain midcycle hyperprolactinemia.
- This hormonal interplay offers insights into reproductive physiology during IVF.