Throughout history, humans have wished for a child of one sex or the other. At last gender selection is scientifically feasible. The most intriguing method is an in vitro fertilization technique called preimplantation genetic diagnosis.
Gender selection techniques
Preimplantation genetic diagnosis (PGD) was originally designed for detecting genetic diseases. It allows genetic analysis to be performed on early embryos prior to implantation and pregnancy. It was intended to exclude genetically defective embryos before they have a chance to develop. Typically one or both partners have been genetically screened and found to be a carrier for a inheritable genetic disorder.
more on: http://www.doctorslounge.com/fertility/articles/pgd/pgd_technique/index.htm
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