BETTER ASSISTED REPRODUCTIVE TECHNIQUE,Preimplantation Genetic Diagnosis(PGD,History of PGD,Gender detection of rabbit blastocyst in 1968 Success of IVF (1978) and development of molecular biology made PGD possible in human PGD success in X-linked diseases was first reported in 1990 (Handyside et al) 40 centers in 17 countries have set up PGD, 400 healthy babies born among 500 pregnancies in about 2000 cycles,Indications of PGD,Genetic diseases, not including sex selection for non-medical reason