Nearly 4,000 women suffer period issues after getting their Covid jab

Nearly 4,000 women report menstrual problems including heavy bleeding and delayed periods after getting their Covid vaccine – but watchdog insists there’s no proof jabs are to blame

  • Issues have primarily affected women aged between 30 and 49, MHRA has said 
  • Reports have typically involved ‘heavier than usual’ bleeding or a delayed period
  • But no evidence they are occurring more commonly than normally expected

Nearly 4,000 women have suffered period problems shortly after getting their Covid jab, Britain’s vaccines watchdog has confirmed. 

The issues, normally involving ‘heavier than usual’ bleeding or a delayed period, have primarily affected women aged between 30 and 49.

The Medicines and Healthcare products Regulatory Agency (MHRA) said it had received 2,734 reports linked to the AstraZeneca jab up to May 17.

Another 1,158 reported menstrual changes after receiving Pfizer’s and a further 66 were linked to the recently deployed Moderna jab.    

Experts said the number of women suffering from period problems will ‘definitely’ be higher because many don’t take the time to report them through official channels. 

The figures, obtained by the Sunday Times, have raised questions about why menstrual changes are not included on the MHRA’s list of Covid jab side effects.  

But the regulator said a review into the issue concluded that the symptoms were not happening more frequently in newly vaccinated women than the general population. It said it would continue to ‘closely monitor’ the situation.

Nearly 4,000 women have suffered period problems after getting their Covid jab, according to Britain’s vaccines watchdog

On its website, the MHRA said the number of reports was ‘low in relation to both the number of females who have received Covid vaccines to date and how common menstrual disorders are generally’. 

‘The current evidence does not suggest an increased risk of either menstrual disorders or unexpected vaginal bleeding following the vaccines,’ it adds. 

‘The MHRA will continue to closely monitor reports of menstrual disorders and vaginal bleeding with COVID-19 vaccines.’

One million jabs were booked over the weekend as officials launched a ‘summer sprint’ to vaccinate all over-18s by July 19.

Thousands queued in the rain for jabs at Tottenham Hotspur’s stadium in north London yesterday after the football club turned into a walk-in vaccine clinic for the day. Most of those getting vaccinated were in their late teens or 20s.

Officials are in a race to vaccinate younger adults in a bid to halt the spread of the Indian variant and stop students bringing Covid-19 back home over the summer holidays, potentially infecting older generations. 

Cases are currently highest among people in their 20s and infections are five times higher in under-25s than in over-65s, as almost all older adults have received both doses.

Everyone aged 18 and over is being urged to arrange a jab if they have not yet had one, as the health service enters the final push to protect the country against the virus. 

Public Health England said there has been a 79 per cent rise in one week in cases of the Delta variant, first identified in India, with the increase being driven by younger age groups.

Similar pop-up centres to the one at Tottenham Hotspur were set up on Saturday at sporting venues in London and giant jab clinics were also opened at the Olympic Stadium, Stamford Bridge, Charlton Athletic FC, Selhurst Park and Crystal Palace Athletics Centre.  

There were also pop up clinics at universities, such as in York and Canterbury.

Up to a quarter of women of childbearing age experience menstrual irregularities, which can include heavier or lighter than usual bleeding, delayed or early periods and cramps. 

They are often triggered by hormonal changes and stress, as well as certain medical conditions and medications.

Similar issues after vaccination have been reported in the US, but scientists say it is too early to confirm a link.  

Britons are currently only warned that they may experience headaches, nausea, achy muscles and pain at the injection site after getting their jab. One in 10 people experience mild side effects from the jab.

Dr Pat O’Brien, vice president of the Royal College of Obstetricians and Gynaecologists, said the reports should not put women off getting their jab.

He agreed with the MHRA’s assessment that the period changes were not happening more commonly in vaccinated women. 

‘It’s important to remember these side effects are mild and should not deter women from having the vaccine when they are called. 

‘Many women will experience a temporary change in their periods from time to time during their lives. And right now, many women in their 20s and 30s are having the Covid vaccine. 

‘So it seems inevitable that in some women these two events will coincide by chance. If, however, these changes persist, or you have any new vaginal bleeding after the menopause, you should see your doctor.

‘We also want to stress that these perceived changes in menstrual cycle after having the Covid vaccine should not be confused with an impact on fertility and the ability to have children. There is no evidence to suggest that Covid vaccines will affect fertility.’

Experts have said, however, that many of the cases following vaccination will have gone unreported.

Victoria Male, a reproductive immunologist at Imperial College London, said it was ‘definitely true’ that many women will have brushed off the symptoms because they were not aware they could file a report to the MHRA’s Yellow Card scheme for monitoring Covid vaccine side effects.

Some women have said they wished there was more awareness about the possible link. Angharad Planells, 34, from Cheltenham, told the Sunday Times her period had been 11 days late after her second dose of the AstraZeneca vaccine.

Despite being one of the most ‘painful periods’ of her life, she added: ‘I would still have the vaccine again. I have had family members die from Covid. It’s just the lack of information out there.’

All three vaccines being used in the UK have been deemed safe for women but those under 40 are being offered alternatives to AstraZeneca’s due to its small risk of blood clots. 

The Joint Committee on Vaccination and Immunisation (JCVI) advises that it is ‘preferable’ for pregnant women in the UK to be offered the Pfizer and Moderna vaccines where available.

They were approved following data from rollouts in the US and Israel where mothers-to-be were given the jabs without any safety issues. 

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