On Slate, Claudia Kolker looks at the latest research and thinking about dealing with "intersex" or gender indeterminate children, a condition with multiple possible causes where a newborn's gender is ambiguous. To some degree or another, it affects approximately 1 in 2,000 births.
For the last 50 years or so, the standard treatment has been to quickly choose a gender for the child, surgically create the appropriate genitalia, then purge the medical history of any anomalies. But this doesn't always work. Take the now well-known case of David Reimer, who, after a botched circumcision, was castrated and raised as a girl, on his doctor's recommendation. After a tortured life, Reimer found out about his original gender, started living as a man, but recently committed suicide.
Anyway, some experts are starting to advise parents to wait a while and see if a gender manifests itself in other ways before deciding to operate. For the 1 in 2000 of you who need this info, I hope it helps.