Why are so many children being born with sex defects?

1.2 million Britons are thought to have been born with some kind of disorder of sexual development as a result of errors in their genetic code. The disorders may be becoming increasingly common as a result of chemicals in plastics and hormones excreted by women taking the Pill, or similar drugs used in animal rearing.

http://www.dailymail.co.uk/health/article-2064554/Why-children-born-sex-defects.html