on the 30/06/2021, after first dose, got period 5 days too early. in the 27/07, got second dose and after period came 5 days too early; this is a spontaneous report received from a contactable reporter (consumer) from the ra-web. regulatory number: ie-hpra-2022-091397. a 39-year-old female patient received bnt162b2 (comirnaty), administration date 30jun2021 (lot number: fe2625) at the age of 39 years as dose 1, single and administration date 27jul2021 (lot number: fc5029) as dose 2, single for covid-19 immunisation. the patient's relevant medical history and concomitant medications were not reported. on 30jun2021 after the first dose, the patient got her period 5 days too early. on 27jul2021, she got her second dose and after period came 5 days too early; (medically significant) with outcome of unknown. additional information: patient never got covid as far as they know. the reporter commented that in the 27 years they had their periods, they never had their period early like that and it happened each time after their vaccine doses. no follow-up attempts are possible. no further information is expected.; sender's comments: linked report(s) : ie-pfizer inc-202200207784 same reporter/patient/drug, different events/timeline/dose