Gender Selection 

Genetic screening of embryos and fetuses raise issues of gender selection. Some single gene disorders affect only males, for example hemophilia. Scientists have identified 200 disorders that are passed only by gender, and selection of embryos based on their gender may prevent those diseases.

Though gender selection is possible with current technology, in 1994, the Ethics Committee of the American Society of Reproductive Medicine concluded that whereas preimplantation sex selection is appropriate to avoid the birth of children with genetic disorders, it is not acceptable when used solely for non-medical reasons.