heavy periods; this is a spontaneous report received from a contactable consumer (patient) from the ra. regulatory number: gb-mhra-webcovid-202202211040545990-2rdfb. other case identifier(s): gb-mhra-adr 26628655. a female patient (not pregnant) received bnt162b2 (bnt162b2), administration date 18jun2021 (lot number: fc9001) as dose 1, single and on an unspecified date (batch/lot number: unknown) as dose 2, single for covid-19 immunisation. the patient's relevant medical history and concomitant medications were not reported. the following information was reported: heavy menstrual bleeding (medically significant) with onset 16jul2021, outcome "recovering", described as "heavy periods". clinical course: the patient stated her period was exceptionally heavy after receiving both doses of the pfizer vaccine. she was currently trying to conceive and she actually thought she was experiencing a very early miscarriage. she would never know if this was the case. the patient clarified she had had a scan which had not shown any concern, however, she was still not pregnant after 10 months of trying. the patient underwent the following laboratory tests and procedures: sars-cov-2 test: negative; scan: had not shown any concern. patient had not tested positive for covid-19 since having the vaccine. patient was not enrolled in clinical trial. no follow-up attempts are possible; information about lot/batch number for dose 2 cannot be obtained. no further information is expected

test name: covid-19 virus test; test result: negative ; test name: scan; result unstructured data: test result:had not shown any concern

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