1st live birth from transplanted ovarian tissue
The procedure carried out in a rhesus monkey could, researchers say, be used for humans.
The development gives new hope to women who have become infertile following cancer treatment.
The breakthrough was announced at the American Society for Reproductive Medicine (ASRM) conference in San Antonio.
Scientists from Oregon University removed part of the ovary in a rhesus monkey and transplanted it to another part of the body.
When eggs matured on the transplanted tissue, they were collected in fertilised in the lab.
The embryos were transplanted back into the womb and one developed into a healthy baby monkey.
This technique, the scientists say, could be adapted to use in humans.
'It's a great step forward,' says Oregan researcher Professor Nancy Klein.
'The technology could allow women to preserve fertility in cases where they are going to lose it prematurely - say in the case of women undergoing chemotherapy for cancer.'
Women and young girls who are diagnosed with cancer could have ovarian tissue frozen and transplanted years later when they wanted to conceive.
However, Professor Klein is more sceptical about the idea of healthy women storing ovarian tissue so that they could conceive later in life, overcoming the menopause and having babies in their late 40s or 50s.
'We're far away from that,' she says.
'There is a great loss rate of the number of eggs that will survive the freezing process, and so it requires usually the removal of a whole ovary. Women who are already in their mid-30s probably won't have enough eggs to make that a feasible approach.'
1st vii de la naºtere þesutului transplantat ovarian - 1st live birth from transplanted ovarian tissue - articole medicale engleza - startsanatate