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Transwomen will be able to get a life-changing womb transplant in the ‘near future’, leading fertility experts have claimed.
The huge scientific breakthrough would give biological males the chance to carry a child, a feat currently impossible.
Infertile women around the world have already given birth thanks to the pioneering op.
Only tiny modifications would be needed to make it a reality for men too, according to world-renowned voices in the transplantation field.
Wombs could come from deceased women and donors who have decided to have their own reproductive organs removed — which can happen when women decide to become men.
This graphic shows the potential way a person born a biological man could have a womb surgically inserted into the body, paving the way for first ever male pregnancy
Academics behind the claim carried out North America’s first womb transplant from a deceased donor which resulted in the birth of a child.
The team, from the prestigious Cleveland Clinic in Ohio, wrote about the possibility of performing the surgery on a biological man in Fertility and Sterility.
Campaigners argue transgender women should have the same right to carry a child as a woman born female.
Could a womb transplant make it possible for a biological man to get pregnant?
The ultimate goal of giving a biological male a womb transplant would be giving them the chance to become pregnant.
We don’t know at this stage if this would be possible, only one attempt has been made, all the way back in the 1930s and wasn’t successful.
But fertility treatment has come a long way since then.
Children have been delivered by woman who have had a womb transplant via IVF, an egg fertilised in the lab being implanted into the womb.
In theory, this process could be also applied to a transwoman.
They could then receive a hormone regime that mimics those a woman’s body produces naturally during pregnancy to support the development of the baby.
These regimes already exist for biological females with hormonal disorders.
Babies that have been implanted in womb transplants before have been born via C-section and it is presumed the same would be true for transwomen.
Experts have cautioned however that we know very little about how this process could and if this type of pregnancy would be carry any risks to the foetus and/or mother.
But not everyone agrees. Some critics have labeled the prospect as a ‘selfish exercise’ by transwomen that is ‘insulting’ to motherhood.
Around 100 womb transplants have been carried out globally since 2014, when the procedure was first successfully performed by experts in Sweden.
Dozens of women have also successfully gone on to get pregnant thanks to the procedure in combination with IVF.
It is not routinely available in Britain yet — but experts hope they will be in time.
Dr Rebecca Flyck, lead author of the new article, said not opening the surgery up to transwomen would be a form of discrimination.
‘As we increasingly recognise a history of inequality and discrimination for transgender women, we must question whether it is acceptable that transgender women are denied access to clinical trials based on their gender identity and trans status,’ she said.
She added that giving transwomen wombs would help address the mental anguish they suffered by not being able to fully embrace their gender identity.
‘Further, as studies accumulate revealing high levels of depression and suicidality in trans women and demonstrate the emotional impact of reduced procreative ability in this population, we must consider the potential benefits of bringing uterus transplantation to transwomen,’ she said.
Dr Flyck added it was a matter of when the surgery was conducted, not if.
‘The first uterus transplant in a transgender female in the 21st century is anticipated to take place within the next few years, if not sooner,’ she said.
The article by Dr Flyck and colleagues doesn’t provide a detailed guide into how this potential surgery would be conducted.
But it is likely the first step would be a transwoman undergoing a vaginoplasty, so that their body is more similar to that of a biological woman.
This extensive operation involves crafting a neovagina using tissue from elsewhere in the body, such as the penis or a section of bowel, and provides a base to attach a transplanted womb.
This process would also likely involve the removal of the testicles to stop the production of male hormones that could interfere with a future baby, with sperm being frozen for potential future fertility treatment.
Theoretically, this could see transwomen get pregnant with their own babies, similar to biological women who can do IVF using their own pre-harvested eggs.
After a recovery period following the vaginoplasty, the transwoman could then seek a womb transplant.
Like other organ donations, such as kidney or liver, a transwoman wanting a womb would need to find a donor with the same blood and tissue type.
A womb removed would come with some of the attached blood vessels required to feed the organ, in exactly the same way it would for a biological female patient.
It would then be surgically inserted into the transwoman in a major op connecting it to their neovagina.
This unnamed girl was the first baby born in the US from a womb that had been donated from a deceased woman, herself a mother, back in 2019
Dr Flyck and colleagues said the procedure, which could take upwards of 11 hours, would run almost identically to that performed for a biological female.
However, surgeons would need to beware of one additional complication.
There is a significant difference in the width of the internal iliac vessels, which feed the lower part of the body, between men and women.
WHY BIOLOGICAL MEN CAN’T GIVE BIRTH… YET
Only females can make eggs, which means it is not possible for a male-to-female trans woman to get pregnant naturally.
Scientists believe it is theoretically possible to impregnate a trans woman using IVF, when the eggs are fertilised outside the body and then inserted.
But it would require a healthy womb for the child to grow in.
There has only ever been one documented case of a womb being transplanted into a trans woman born male — but she died from complications just months later.
Female-to-male transgender people can still get pregnant.
But only if they have not had a hysterectomy as part of their transition or have taken hormone-blocking drugs that stop them from producing eggs.
There are no definitive figures when it comes to how many transgender people have given birth worldwide, or in Britain.
Seventy-five people who identified as male gave birth in Australia in 2020, the most comparable country with data.
The size difference varies between specific individuals, but is roughly about 1.6mm wider in biological females.
The authors said a mismatch between the two, with a smaller vessel connected to a larger one, carries the risk of generating a dangerous blood clot.
However, they add this risk could be mitigated by trimming the blood vessels so that they match.
They added that another challenge is the health of the neovagina.
In comparison to a natural vagina, they claimed a neovagina lacks the same amount and distribution of blood vessels.
This means there’s potential risk the surgical connection between it and the donated womb could fail.
Like with any organ donation, the transwoman would need to take immune system suppressant drugs to prevent their body from rejecting the transplant.
Dr Flyck and team also considered how a transwoman who receives a womb could become pregnant and then ultimately give birth.
IVF would be the only option as a womb transplant does not include the ovaries or fallopian tubes that store and transport eggs — making natural pregnancy impossible.
A transwoman wishing to carry a baby to term would also need to receive artificial hormones to mimic those the female body generates in a normal pregnancy.
There are already established hormone regimes available for this, which are used by biological women with hormonal disorders during pregnancy.
And like normal uterus transplants, the baby would probably be born via C-section due to risks a vaginal birth poses to the surgical connection between the vagina and the donated womb.
Despite saying they supported the case for clinical trials of womb transplants in transwomen, the experts acknowledged there are ‘several significant’ unknowns about the safety of the procedure, especially long-term, and more data is needed.
Uterus transplants, which are only available for reproductive purposes, are normally removed following the birth of a single child, but sometimes are kept for two.
But a transwoman might, in theory, want to keep their womb for longer as part of treating their gender dysphoria by allowing them to menstruate.
The authors said this prospect could carry unknown dangers to the patient.
‘For transgender women who wish to preserve their transplanted uterus indefinitely with immunosuppression for the purpose of menstruation and enhanced gender alignment, the risk/benefit ratio is unclear and potentially worrisome,’ they said.
Lili Elbe (left) was a Danish transwoman and was the first to ever attempt at giving a biological male a womb transplant in 1931. However, she died from a cardiac arrest brought on by a post-surgery infection three months after the operation. Her life story was made into a film in 2015 called The Danish Girl, which starred Eddie Redmayne (right)
While allowing a biological male to give birth would represent a major scientific breakthrough, some critics have described the idea as ‘dystopian’.
Feminist author Milli Hill, who has spoken against the rise of inclusive, and often women-erasing, terminology in healthcare, said the prospect felt like a ‘very selfish exercise’ and even ‘insulting’ to women.
‘In some ways the idea that a male can give birth if only they have a uterus is quite insulting to women, reducing us to mere incubatory vessels, she said.
‘We know pregnancy, birth and motherhood are an incredibly complex biological and emotional journey for women.’
The idea transplanting a uterus would alleviate a transwoman’s gender dysphoria was also flawed, she claimed, reducing the identity of being a woman to a simple biological check list.
Ms Hill said: ‘What does the idea that uterus “equals more female” mean for women who have undergone hysterectomy, for example? Are they somehow less female?’
She added that such logic also contradicted the trans-movement itself, given how society is told to accept all transwomen, including those with intact male biology, as the exact same as biological females.
‘We are often told a person with a penis and a beard may now be a woman, because it is the person’s inner sense of their gender that dictates who they are, not their biological sex,’ she said.
This is not the first time that womb transplants for transwomen have been discussed in the modern era.
In May last year, Indian surgeon Dr Narendra Kaushik said he was planning to transplant a womb into a transwoman with the goal of them eventually becoming pregnant.
And a womb transplant for a biological male was attempted once before, all the way back in 1931.
Danish artist Lili Elbe, who was born male, had the surgery in Germany with the hope of being able to have children with her fiancé.
However, she died from a cardiac arrest brought on by a post-surgery infection three months after the operation without having conceived a child.
There have obviously been a raft of medical improvements since the 1930s, both in terms of surgical technique, post-operative care, and fertility treatments like IVF.
This means that such a procedure would be much more feasible, at least in practice, today.
Womb transplants are successfully performed in the US, with a patient in Ohio being the first in the country to carry a baby to term using the transplanted womb from a deceased donor in 2019.
The pioneering operation saw womb and blood vessels removed from a 45-year-old woman – herself a mother – who had died of a stroke.
They were then implanted into a new mother, who was born without a womb of her own, in an almost 11-hour operation, and the blood vessels connected to her own.
The women then began to menstruate 37 days after the op and then had regular periods until she became pregnant seven months later.
An embryo was implanted using eggs which had been taken from her ovaries before the womb transplant procedure and fertilised using IVF.
The baby grew healthily and was born after 35 weeks and three days by caesarean section.
During the caesarean, the woman’s implanted womb was also removed and both mother and baby recovered normally.
Transwomen cannot get pregnant naturally as, due to being born male, their bodies do not produce the eggs needed for fertilisation, in addition to not having a womb to carry the developing baby.
But transmen – those who were born women and then transitioned to become men – can become pregnant.
This is because they still have the reproductive system of a female, unless it has been removed as part of gender affirming surgery.
There are no definitive figures when it comes to how many transmen have given birth worldwide, or in Britain.
Seventy-five people who identified as male gave birth in Australia in 2020, the most comparable country with data.