Nonsteroidal Anti-Inflammatory Drugs and Reversible Female Infertility

In: Drug Safety · 2002 · vol. 25(8) , pp. 545–551 · doi:10.2165/00002018-200225080-00001 · PMID:12113640 · W1993006645
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Nonsteroidal anti-inflammatory drugs may cause reversible infertility in women by inhibiting cyclo-oxygenase-2 and disrupting ovulation, leading to luteinized unruptured follicle syndrome.

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This paper reviews evidence that nonsteroidal anti-inflammatory drugs (NSAIDs), by inhibiting cyclooxygenase (COX) and thereby prostaglandin production, may cause reversible female infertility via luteinised unruptured follicle (LUF) syndrome and delayed follicular rupture. It synthesizes mechanistic data from COX-2–deficient mice and prostaglandin experiments in rabbits, alongside three clinical studies in previously ovulating women in which NSAID administration induced delayed follicular rupture or LUF. A key limitation acknowledged by the nature of the evidence base is that the causal link relies on a small number of case series/clinical studies supplemented by animal and experimental findings. Relevance to endometriosis: the paper cites an older clinical treatment discussion of endometriosis (Shaw 1992) but the paper’s main focus is NSAIDs and reversible infertility rather than endometriosis-specific mechanisms.

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Abstract

Nonsteroidal anti-inflammatory drugs (NSAIDs) are frequently prescribed to women of child-bearing age. Three case series highlight the possibility of a link between NSAIDs and reversible infertility. The pharmacological target of NSAIDs is cyclo-oxygenase (COX), which catalyses the first rate-limiting step in the production of prostaglandins. COX-2, one of two isoenzymes, is active in the ovaries during follicular development. Its inhibition is thought to cause luteinised unruptured follicle (LUF) syndrome, an anovulatory condition characterised by clinical signs of ovulation but in the absence of follicular rupture and ovum release. The evidence linking regular NSAID use to reversible LUF syndrome comes from animal studies and three clinical studies. COX-2-deficient mice have severely compromised ovulation in the presence of apparently normal follicular development. Experimental administration of prostaglandins induced ovulation in rabbits and this was blocked by the administration of indomethacin. The three clinical studies demonstrated the induction of delayed follicular rupture or LUF in previously ovulating women by the administration of NSAIDs. A link can therefore be identified between NSAID use and reversible female infertility and NSAID withdrawal should be considered prior to or concurrent with fertility investigations.
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Abstract

Nonsteroidal anti-inflammatory drugs (NSAIDs) are frequently prescribed to women of child-bearing age. Three case series highlight the possibility of a link between NSAIDs and reversible infertility. The pharmacological target of NSAIDs is cyclo-oxygenase (COX), which catalyses the first rate-limiting step in the production of prostaglandins. COX-2, one of two isoenzymes, is active in the ovaries during follicular development. Its inhibition is thought to cause luteinised unruptured follicle (LUF) syndrome, an anovulatory condition characterised by clinical signs of ovulation but in the absence of follicular rupture and ovum release. The evidence linking regular NSAID use to reversible LUF syndrome comes from animal studies and three clinical studies. COX-2—deficient mice have severely compromised ovulation in the presence of apparently normal follicular development. Experimental administration of prostaglandins induced ovulation in rabbits and this was blocked by the administration of indomethacin. The three clinical studies demonstrated the induction of delayed follicular rupture or LUF in previously ovulating women by the administration of NSAIDs. A link can therefore be identified between NSAID use and reversible female infertility and NSAID withdrawal should be considered prior to or concurrent with fertility investigations. Similar content being viewed by others

References

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Acknowledgements

Dr Stone is funded by Tommy’s Campaign. We gratefully acknowledge their continued support. We would also like to thank Professor Peter Braude for his critical review of the manuscript. Author information Authors and Affiliations Corresponding author Rights and permissions About this article Cite this article Stone, S., Khamashta, M.A. & Nelson-Piercy, C. Nonsteroidal Anti-Inflammatory Drugs and Reversible Female Infertility. Drug-Safety 25, 545–551 (2002). https://doi.org/10.2165/00002018-200225080-00001 Published: Issue date: DOI: https://doi.org/10.2165/00002018-200225080-00001

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