The effects of oral contraceptives on resting autonomic function and the autonomic response to physiological stressors: a systematic review
- PMID: 37971640
- DOI: 10.1007/s10286-023-00996-0
The effects of oral contraceptives on resting autonomic function and the autonomic response to physiological stressors: a systematic review
Abstract
Purpose: This systematic review aimed to summarize how oral contraceptives (OC) affect resting autonomic function and the autonomic response to a variety of physiological stressors.
Methods: A search strategy was created to retrieve citations investigating physiological responses comparing OC users to non-users (NOC) in response to autonomic reflex activation.
Results: A total of 6148 citations were identified across databases from inception to June 2, 2022, and 3870 citations were screened at the abstract level after deduplication. Then, 133 texts were assessed at full-text level, and only 40 studies met eligibility requirements. Included citations were grouped by the aspect of autonomic function assessed, including autonomic reflex (i.e., baroreflex, chemoreflex, mechanoreflex, metaboreflex, and venoarterial reflex), or indicators (i.e., heart rate variability, pulse wave velocity, and sympathetic electrodermal activity), and physiological stressors that may alter autonomic function (i.e., auditory, exercise, mental or orthostatic stress, altitude, cold pressor test, sweat test, and vasodilatory infusions).
Conclusion: OC influence the physiological responses to chemoreflex, mechanoreflex, and metaboreflex activation. In terms of autonomic indices and physiological stressors, there are more inconsistencies within the OC literature, which may be due to estrogen dosage within the OC formulation (i.e., heart rate variability) or the intensity of the stressor (exercise intensity/duration or orthostatic stress). Further research is required to elucidate the effects of OC on these aspects of autonomic function because of the relatively small amount of available research. Furthermore, researchers should more clearly define or stratify OC use by duration, dose, and/or hormone cycling to further elucidate the effects of OC.
Keywords: Autonomic; Oral contraceptives; Pharmaceutical sex hormones; Reflex.
© 2023. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany.
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References
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- United Nations Department of Economic and Social Affairs, Population Division (2022) World family planning 2022: meeting the changing needs for family planning: contraceptive use by age and method. UN DESA/POP/2022/TR/NO.4.
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