A new study may help answer many of the queries. These changes, while statistically significant, were well within the range of natural variability. According to the study, 1,501 women who took either the flu shot alone (791) or both shots together (710) experienced their menstrual cycle increased by a statistically significant 0.4 days and 0.49 days in their first cycle after being vaccinated
Their subsequent cycles were either normal or almost normal. On average, individuals who received the influenza vaccine alone experienced an adjusted increase in cycle length of just 0.40 days The flu shot may cause temporary menstrual changes in some individuals, but no lasting effects on the menstrual cycle have been proven.
Shah, there are no strong data to suggest that the. Getting a flu shot may affect your menstrual cycle, a study has revealed—although the change is temporary and typically very minor Researchers at oregon health & science university found that.
