Latest update from Yellow Card report (updated 9th July 2021):
"Menstrual disorders (period problems) and unexpected vaginal bleeding
The MHRA is investigating reports of menstrual disorders (period problems) and unexpected vaginal bleeding following vaccination against COVID-19 in the UK. These reports are also being reviewed by the independent experts of the Commission on Human Medicines’ COVID-19 Vaccines Benefit Risk Expert Working Group and members of the Medicines for Women’s Health Expert Advisory Group.
A total of 20,680 reports of a variety of menstrual disorders have been reported after all three of the COVID-19 vaccines including heavier than usual periods, delayed periods and unexpected vaginal bleeding. This is following approximately 41 million COVID-19 vaccine doses administered to women up to 30 June 2021. The number of reports of menstrual disorders and vaginal bleeding is low in relation to both the number of females who have received COVID-19 vaccines to date and how common menstrual disorders are generally.
The MHRA is carrying out a detailed analysis of the evidence, including considering other relevant data sources, for review by experts. Menstrual disorders account for 12% of all referrals to gynaecology services. Changes to the menstrual cycle have also been reported following infection with COVID-19 and in women affected by long-COVID. There is no evidence of an effect on fertility of COVID-19 vaccines.
Advice about period problems and/or unexpected vaginal bleeding is available at: www.nhs.uk It is important that anyone experiencing menstrual disorders and/or unexpected vaginal bleeding should seek medical advice, with these events being investigated in line with clinical guidance."
Anyone who hasn't yet reported side effects should report them here.