A woman gave birth in late October to a baby boy conceived via in vitro fertilization that used the sperm of her HIV-positive husband from which the virus had been eradicated, according to a professor at Niigata University Faculty of Medicine who performed the procedure.

Neither the mother nor the baby are infected with the HIV virus, said Kenichi Tanaka, who carried out the treatment with doctors from Ogikubo Hospital and Keio University School of Medicine, both in Tokyo.

According to the doctors, there are documented cases both in Japan and abroad in which babies have been born to women artificially inseminated by an injection of sperm, treated to eradicate the HIV virus, into their womb.