LOS ANGELES , California -LRB- CNN -RRB- -- The doctor who implanted six embryos in octuplets ' mother Nadya Suleman last year has been expelled from a fertility medical society , a spokesman for the group said . Nadya Suleman gave birth to eight babies after being implanted with six embryos by Dr. Michael Kamrava . Dr. Michael Kamrava demonstrated `` a pattern of behavior that violated the group 's standards , '' American Society for Reproductive Medicine spokesman Sean Tipton said . An employee at Kamrava 's Beverly Hills , California , clinic -- the West Coast IVF Clinic -- said the doctor would not be commenting on the expulsion . The expulsion , which was imposed last month and just announced , does not affect Kamrava 's ability to practice , because affiliation with the professional association is voluntary . Suleman was 33 years old in January 2009 when she gave birth to eight babies . She was a single woman who already had six young children conceived through in-vitro fertilization . The reproductive medicine society recommends no more than two embryos for women under 35 years old and no more than five for women over 40 , for whom it is harder to get pregnant , according to guidelines published on its Web site . Suleman , in an interview in February on NBC , said Kamrava told her about risks for the children , but she did not want to have only one or two embryos implanted . `` Of course not , I wanted them all transferred , '' she said . `` Those are my children . And that 's what was available and I used them . I took a risk . It 's a gamble . It always is . '' Two of the six embryos split in utero , resulting in the birth of eight babies . Doctors say giving birth to extreme multiples comes with tremendous risks for the mother and the babies . Risks for the children include bleeding in the brain , intestinal problems , developmental delays and lifelong learning disabilities . Suleman 's children , six boys and two girls born nine weeks premature , all went home after an extended stay in the hospital . No indication has been given on whether any problems have emerged . Suleman and her children will star in a `` quasi-reality TV series '' about the family , it was announced in June . CNN 's Carey Bodenheimer contributed to this report .