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The Effects of Ethinylestradiol and Progestins (“the pill”) on Cognitive Function in Pre-menopausal Women

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Abstract

Oral contraceptives (OCs), often referred to as “the pill”, are the most commonly employed form of reversible contraception. OCs are comprised of combined synthetic estrogen and progestin, which work to suppress ovulation and subsequently protect against pregnancy. To date, almost 200 million women have taken various formulations of OC, making it one of the most widely consumed classes of medication in the world. While a substantial body of literature has been dedicated to understanding the physical effects of OCs, much less is known about the long term consequences of OC use on brain anatomy and the associated cognitive effects. Accumulating evidence suggests that sex hormones may significantly affect human cognition. This phenomenon has been commonly studied in older populations, such as in post-menopausal women, while research in healthy, pre-menopausal women remains limited. The current review focused on the effects of OCs on human cognition, with the majority of studies comparing pre-menopausal OC users to naturally cycling women. Human neuroimaging data and animal studies are also described herein. Taken together, the published findings on OC use and human cognition are varied. Of those that do report positive results, OC users appear to have improved verbal memory, associative learning and spatial attention. We recommend future research to employ blinding procedures and randomised designs. Further, more detailed information pertaining to the specific generation and phasic type of OCs, as well as menstrual cycle phase of the OC non-users should be considered to help unmask the potential impact of OC use on human cognition.

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Acknowledgments

The authors gratefully acknowledge the financial support of the Australian Research Council (A. Gogos, DECRA). The Florey Institute of Neuroscience and Mental Health acknowledge the support from the Victorian Government’s Operational Infrastructure Support Grant.

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Authors and Affiliations

  1. Florey Institute of Neuroscience and Mental Health, University of Melbourne, Kenneth Myer Building, Parkville, VIC, 3010, Australia

    Andrea Gogos & YeeWen Candace Wu

  2. School of Psychology, Deakin University, Burwood, VIC, Australia

    Amy S. Williams & Linda K. Byrne

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  1. Andrea Gogos
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  2. YeeWen Candace Wu
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  3. Amy S. Williams
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  4. Linda K. Byrne
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Correspondence to Andrea Gogos.

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Gogos, A., Wu, Y.C., Williams, A.S. et al. The Effects of Ethinylestradiol and Progestins (“the pill”) on Cognitive Function in Pre-menopausal Women. Neurochem Res 39, 2288–2300 (2014). https://doi.org/10.1007/s11064-014-1444-6

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  • DOI: https://doi.org/10.1007/s11064-014-1444-6

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