A medical society expelled a member doctor for performing an in vitro fertilization with the eggs of an unmarried woman, a news report said. The Japan Society of Obstetricians and Gynecology said Yahiro Netsu violated the group's ethical rules, Kyodo News reported. The report said Netsu conducted an in vitro fertilization for a married couple, using the husband's sperm and the eggs of the woman's unwed sister. That violated the society's rules against "extramarital" in vitro fertilization, an operation in which a woman's eggs are fertilized in a laboratory and transferred into the uterus. The expulsion will not affect Netsu's right to work.