Unvaccinated pregnant women make up nearly one fifth of the most critically ill Covid-19 patients in recent months, new data has revealed.

Over the last three months, 17 per cent of the Covid patients receiving treatment through a special lung-bypass machine in England were mothers-to-be who had not had their first dose of a Covid-19 vaccine, according to NHS England.

Data also shows that pregnant women accounted for around a third of all women aged between 16 and 49 in intensive care on extracorporeal membrane oxygenation (ECMO).

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NHS England said this figure has risen from 6 per cent at the beginning of the pandemic in March 2020.

ECMO is used when a patient’s lungs are so damaged by Covid that a ventilator cannot maintain oxygen levels.

Health officials are now urging pregnant women to come forward for vaccinations.

More than 81,000 pregnant women have received the first dose of a Covid vaccine, and around 65,000 have received their second dose, according to Public Health England (PHE) data.

Data from hundreds of thousands of vaccinations across the UK and the US has shown that there has been no subsequent harm to the foetus or infant, NHS England said.

Mother-to-be Claire Bromley, 33, who spent almost a month in hospital with coronavirus, said she feels the risk of being unjabbed “far outweighs any doubts” about getting a vaccination.

She was unvaccinated when she was admitted to hospital in Kent with breathing difficulties just a few days after testing positive for Covid-19.

She had to be put on a ventilator while in a medically induced coma.

When her condition deteriorated, medics thought she might need an emergency C-section just 26 weeks into her pregnancy and she was transferred to another hospital in London.

But her condition improved and she was allowed home in early August, almost a month after first being admitted.

Claire, whose unborn baby is doing well, said: “I completely understand the hesitation not to get vaccinated when you are growing a child inside you, and, after experiencing two miscarriages before the pandemic, the fear of being pregnant again with the worry of Covid was sending my anxiety through the roof.

“But, after what happened, I can honestly say that the risk of not having the Covid vaccine far outweighs any doubts about having it."

Dr Edward Morris, president of the Royal College of Obstetricians and Gynaecologists, said medics understand women’s concerns but want to offer reassurance that the vaccine is safe.

He said the “disproportionate” number of unvaccinated pregnant women in intensive care shows there is a “significant risk of severe illness from Covid-19 in pregnancy”.

He said: “We are urgently calling for all pregnant women to come forward for their vaccinations.

“There is robust evidence showing that the vaccine is the most effective way to protect both mother and baby against the possibility of severe illness from Covid-19.

“The disproportionate number of unvaccinated pregnant women in intensive care demonstrates that there is a significant risk of severe illness from Covid-19 in pregnancy.

“We do understand women’s concerns about having the vaccine in pregnancy, and we want to reassure women that there is no link between having the vaccine and an increased risk of miscarriage, premature birth, or stillbirth.”

England’s chief midwife, Jacqueline Dunkley-Bent, said the data is “another stark reminder that the Covid-19 jab can keep you, your baby and your loved ones safe and out of hospital”.

Addressing mothers-to be, she said: “You can receive vaccination at any time in pregnancy, but the risks that unvaccinated pregnant women face of becoming severely unwell if they catch Covid-19 show exactly why we advise you to do so as soon as possible.”

NHS England’s medical director of primary care, Dr Nikki Kanani, told BBC Breakfast that pregnancy puts “quite a strain” on the heart and lungs and if pregnant women get Covid-19 then that “lays on pressure on an already pressurised system inside a pregnant woman, and that’s why almost 20 per cent of people with coronavirus who are having extra support on critical care are pregnant women who are unvaccinated”.

She said: “So the evidence is really clear – if you’re not vaccinated yet and you’re pregnant, please take up that lifesaving offer of protection.”

She added: “I’m a mum of two and you read so much about what you should and shouldn’t do during your pregnancy.

“My advice is clear, the best thing that you can do is to take the vaccine if it is offered to you, and if you’re unsure because of all of the advice out there, speak to a medical professional who can talk about your concerns – and like the 81,000 other pregnant women – you may well feel reassured enough to have that really important first dose of protection.”

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