Study finds no increased risk of menstrual changes after Covid-19 vaccine

A Swedish study of nearly 3 million women has found no evidence of an increased risk of menstrual changes after Covid19 vaccinationMany women have reported changes to their periods after a Covid19 vaccination such as the number of days they bleed and the heaviness of the flowAnalyses of individual vaccines and risk of postmenopausal bleeding suggested a 2333 per cent increased risk after 890 days with PfizerBioNTech and Moderna after the third dose but a less clear association with OxfordAstraZenecaIn premenopausal women weak associations were found for menstrual disturbance or bleeding after vaccination with any dose 13 per cent or 8 per cent after 17 days and 6 per cent or 1 per cent after 890 days respectivelyHowever adjusting for other factors almost completely removed these weak associations suggesting that a causal effect is unlikely said researchers from the University of Gothenburg in SwedenWe observed weak and inconsistent associations between SARSCoV2 vaccination and healthcare contacts for postmenopausal bleeding and even less consistent for menstrual disturbance and premenstrual bleeding said the team in the paper published by The BMJThese findings do not provide any substantial support for a causal association between SARSCoV2 vaccination and healthcare contacts related to menstrual or bleeding disorders they addedThe study included 2946448 women aged 1274 years who were vaccinated against CovidRisks were assessed by vaccine PfizerBioNTech Moderna or OxfordAstraZeneca and dose unvaccinated and first second and third dose over two time windows 17 days considered the control period and 890 daysMore than 25 million 88 per cent of women received at least one Covid vaccination and over 16 million 64 per cent of vaccinated women received three doses during the study periodThe highest risks for bleeding in postmenopausal women were seen after the third dose in the 17 days risk window 28 per cent and in the 890 days risk window 25 per centAdjusting for socioeconomic factors previous healthcare use and for several specific medical conditions had only a modest effect on these resultsThe team said these are observational findings and also have several limitationsBut this was a large study with near complete followup and the findings do not provide any substantial support for a causal association between Covid vaccination and diagnoses related to menstrual or bleeding disordersAlso Read Active Covid cases in country decrease to 33232This story has been sourced from a third party syndicated feed agencies Midday accepts no responsibility or liability for its dependability trustworthiness reliability and data of the text Midday managementmiddaycom reserves the sole right to alter delete or remove without notice the content in its absolute discretion for any reason whatsoever