I became pregnant but lost it and had to have another procedure to remove it; My bleeding is extremely irregular and extra heavy/my bleeding lasted 30+ days at a time then I would get about 1 week without bleeding; I have not been able to conceive since I received the Pfizer vaccine; I started menstruating the following day and my bleeding lasted 30+ days at a time then I would get about 1 week without bleeding; This is a spontaneous report received from a contactable reporter(s) (Consumer or other non HCP). The reporter is the patient.  A 36-year-old female patient (not pregnant) received BNT162b2 (BNT162B2), on 24Mar2022 as dose 2, single (Lot number: FK9896), in left arm for covid-19 immunisation. The patient's relevant medical history was not reported. There were no concomitant medications. Past drug history included: Musinex, reaction(s): "Known allergies: Musinex", notes: Known allergies: Musinex. Vaccination history included: BNT162b2 (DOSE 1, SINGLE, Batch/Lot No: FK9896, Location of injection: Arm Right), administration date: 16Feb2022, when the patient was 36-year-old, for COVID-19 Immunization, reaction(s): "my period didn't start when it was supposed to.". The following information was reported: HEAVY MENSTRUAL BLEEDING (medically significant) with onset 25Mar2022, outcome "not recovered", described as "I started menstruating the following day and my bleeding lasted 30+ days at a time then I would get about 1 week without bleeding"; ABORTION SPONTANEOUS (medically significant), outcome "not recovered", described as "I became pregnant but lost it and had to have another procedure to remove it"; MENSTRUATION IRREGULAR (medically significant), outcome "not recovered", described as "My bleeding is extremely irregular and extra heavy/my bleeding lasted 30+ days at a time then I would get about 1 week without bleeding"; INFERTILITY FEMALE (medically significant), outcome "not recovered", described as "I have not been able to conceive since I received the Pfizer vaccine". The events "i became pregnant but lost it and had to have another procedure to remove it", "i started menstruating the following day and my bleeding lasted 30+ days at a time then i would get about 1 week without bleeding", "my bleeding is extremely irregular and extra heavy/my bleeding lasted 30+ days at a time then i would get about 1 week without bleeding" and "i have not been able to conceive since i received the pfizer vaccine" required physician office visit. Therapeutic measures were taken as a result of abortion spontaneous, heavy menstrual bleeding, menstruation irregular, infertility female.  Clinical course:  Facility type vaccine was Pharmacy or Drug Store. No other vaccine in four weeks. No covid tested post vaccination. Then after my 2nd dose, I started menstruating the following day and my bleeding lasted 30+ days at a time then I would get about 1 week without bleeding. My doctors did a procedure and removed growths in my uterus. I became pregnant but lost it and had to have another procedure to remove it. My bleeding is extremely irregular and extra heavy. It will last anywhere from 5 days to 30 days. I have not been able to conceive since I received the Pfizer vaccine. I did not have problems with my menstruation before Feb2022. Adverse event resulted in Doctor or other healthcare professional office/clinic visit. Adverse event treatment was reported as Dilation and curettage (2).