Timing Of COVID-19 Shot Can Affect Menstrual Cycle Length: Study

A recent study has found that the timing of COVID-19 vaccination can lead to slight, temporary changes in the length of the menstrual cycle. Researchers discovered that individuals who receive the vaccine during the first half of their cycle are more likely to experience changes in cycle length compared to those vaccinated in the latter half. The study, based on data from nearly 20,000 users of a birth control app, found that those vaccinated in the follicular phase experienced a one-day increase in cycle length on average. While the exact mechanism behind these changes is not fully understood, researchers emphasize that any changes are expected to be minor and temporary, and individuals should consult a doctor if experiencing prolonged changes. Further research is needed to understand the impact of COVID-19 vaccination on individuals with irregular menstrual cycles and other aspects of menstruation.

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