Nine women in Sweden have successfully received transplanted wombs donated by relatives and will soon try to become pregnant, has revealed. The women, mostly in their 30s, were born without a uterus or had it removed because of cervical cancer. They are part of the first major experiment to test whether it is possible to transplant wombs into women so they can give birth to their own children.

Life-saving transplants of organs such as hearts, livers and kidneys have been done for decades and doctors are increasingly transplanting hands, faces and other body parts to improve patients' quality of life.

There have been previous attempts to transplant a womb, in Turkey and Saudi Arabia, but both failed to produce babies. Scientists in Britain, Hungary and elsewhere plan similar operations but the efforts in Sweden are the most advanced. "This is a new kind of surgery," Dr Mats Brannstrom said in an interview from Gothenburg. "We have no textbook to look at."

Brannstrom, chair of the obstetrics and gynaecology department at the University of Gothenburg, is leading the initiative. Next month, he and colleagues will run the first-ever workshop on how to perform womb transplants and they plan to publish a scientific report on their efforts soon.

He said the nine womb recipients were doing well. Many had had periods six weeks after the transplants, an early sign that the wombs were healthy and functioning. One woman had an infection in her newly received uterus and others had some minor rejection episodes, but none of the recipients or donors needed intensive care after the surgery, Brannstrom said. All left the hospital within days.

None of the women who donated or received wombs has been identified. The transplants began in September 2012 and the donors include mothers and other female relatives of the recipients. The team had initially planned to do 10 transplants, but one woman could not proceed for medical reasons, the university spokesman Krister Svahn said.

The transplant operations did not connect any of the women's uteruses to their fallopian tubes, so they are unable to get pregnant naturally. But all of them have their own ovaries and can make eggs. Before the operation, they had some removed to create embryos through in-vitro fertilisation. The embryos were then frozen and doctors plan to transfer them into the new wombs, allowing the women to carry their own biological children,

The transplants have ignited hope among women unable to have children because they lost a uterus to cancer or were born without one. About one in 4,500 girls are born with a syndrome known as MRKH, which means they do not have a womb.

Fertility experts say the project is significant but stress that it is unknown whether it will result in healthy babies.

The technique used in Sweden, using live donors, is somewhat controversial. In Britain, doctors plan to perform uterus transplants but, as in Turkey, will only use wombs from dying or dead people. Last year, Turkish doctors said their patient got pregnant but the pregnancy failed after two months.

"Mats [Brannstrom] has done something amazing and we understand completely why he has taken this route, but we are wary of that approach," said Dr Richard Smith, head of the UK charity Womb Transplant UK, which is trying to raise £500,000 to carry out five operations in Britain.

He said a womb transplant was like a radical hysterectomy but it required a bigger chunk of the surrounding blood vessels to be taken to ensure adequate blood flow, raising the risk of complications for the donor. Smith said British officials did not consider it ethical to let donors take such chances for an operation that is not considered life-saving.

Smith said the biggest question was how any pregnancies would proceed. "The principal concern for me is if the baby will get enough nourishment from the placenta and if the blood flow is good enough," he said.

All of the women who received womb transplants will need to take anti-rejection medicines, but Smith said data from women who had received kidney transplants did not suggest their babies were at any increased risk from the drugs.

Brannstrom said using live donors allowed them to ensure the donated wombs were functional and did not have any problems After a maximum of two pregnancies, tsuch as an HPV infection.

Doctors in Saudi Arabia performed the first womb transplant in 2000, using a live donor, but that uterus had to be removed after three months because of a blood clot.

Brannstrom said he and his colleagues hoped to start transferring embryos into some of their patients soon, possibly within months. The Swedish researchers and others have previously reported successful uterus transplants in animals including mice, sheep and baboons, but no offspring from the primates were produced.

he wombs will be removed so the women can stop taking the anti-rejection drugs, which can cause high blood pressure, swelling and diabetes and may also raise the risk of some types of cancer.

Other experts said if the operations were successful, womb transplants could be an alternative for women who have few choices.

"What remains to be seen is whether this is a viable option or if this is going to be confined to research and limited experimentation," said Dr. Yacoub Khalaf, director of the Assisted Conception unit at Guy's and St Thomas' hospital in London, who was unconnected to any of the womb transplant projects.

Lise Gime, 35, who was born without a womb, said she thought many women with the MRKH syndrome would be interested if the operation proveds to be safe and effective. Gime runs an organisation for women with the syndrome in Norway.

"If this had been possible when I was younger, no doubt I would have been interested," she said. Gime, who has two foster children, said the only option for women like her to have biological children iswas via surrogacy, which is illegal in many European countries, including Norway and Sweden.

Brannstrom warned that the transplants might not result in children but remained optimistic.

"This is a research study," he said. "It could lead to [the women)] having a child, but there are no guarantees … what is certain is that they are making a contribution to science."