July 1, 2009 -- French doctors report that a woman who banked her ovarian tissue before sickle cell anemia treatment had a baby girl after getting her ovarian tissue transplanted back into her.
The woman, whose name has not been made public, gave birth on June 22. "Mother and baby are doing well," Pascal Piver, MD, says in a news release.
Piver's team first transplanted 10 tiny pieces of her ovarian tissue, waited three days, and then transplanted the rest of her ovarian tissue. The idea behind that two-step process is to improve the growth of new blood vessels to the transplanted ovarian tissue.
The woman became pregnant without in vitro fertilization, according to a report that Piver and colleagues presented in Amsterdam at the 25th annual meeting of the European Society of Human Reproduction and Embryology (ESHRE).
At the ESHRE meeting, another team of researchers reported that when it comes to freezing ovarian tissue from women with cancer, a quick-freeze method appears to be better than the standard slower method -- and almost as good as fresh ovarian tissue.
That finding came from a study of 15 young women with cancer who had their ovaries removed. Some of the patients had their ovarian tissue quickly frozen (a process called vitrification); others got the standard, slower freezing method.
For comparison, the researchers -- who included Sherman Silber, MD, of the St. Louis Infertility Center in St. Louis -- also studied nine women who got fresh ovarian tissue transplants from their identical twins.
The result: Eggs from the quickly frozen tissue were as viable as eggs from the fresh ovarian tissue, and both of those methods yielded more viable eggs than the slow-freeze method.
These aren't the first ovarian transplants.
In 2004, researchers in the Netherlands successfully transplanted a 29-year-old woman's ovary into her arm after she was treated for cervical cancer. They used her arm as the transplantation site because it was easy to access, and if she wanted to get pregnant, her eggs would be harvested for in vitro fertilization.
However, the American Cancer Society notes that the most common and successful method of preserving fertility in female cancer patients is to freeze embryos conceived through in vitro fertilization, using eggs harvested from the woman's ovaries. Freezing ovarian tissue is an experimental option, according to background information on the American Cancer Society's web site.