Sex selection technologies have become increasingly prevalent and accessible. We can find them advertised widely across the Internet and discussed in the popular media—an entry for “sex selection services” on Google generated 859,000 sites in April 2004. The available services fall into three main types: preconception sperm sorting followed either by intrauterine insemination of selected sperm or by in vitro fertilization ; preimplantation genetic diagnosis, by which embryos created by IVF are tested and only those of the desired sex are (...) transferred to the woman's uterus; and prenatal testing of fetuses through ultrasound or chromosomal analysis, followed by selective abortion of fetuses detected to be of the undesired sex. (shrink)