|1968||Edwards & Gardner||First embryo biopsy on rabbit embryos.|
|1980||Harper||PGD on human was developed in U.K.|
|1989||Handy side & Colleagues||First unaffected child born following PGD for X-linked disorder in London|
What Causes Genetic Defects ?
Every human body cell carries 23 pairs of chromosomes, which are string like structures where all of our genetic material (gene) resides, Genes are made up of DNA sequences. Each cells has ~ 30,000 genes. Genetic disease is caused by abnormalities of gene function.