How many time has a doctor to register the sex of a baby in the United States? and in other countries?

I need details on how many time does a doctor have to determine and register the sex of a baby in different countries. If you can send me references and/or links I will appreciate it. Thanks!How many time has a doctor to register the sex of a baby in the United States? and in other countries?as often as one is born so you would actually want to research the number of birth per year and the find out how many were boy and how many were girl. All doctors have to report births and what sex they baby was.How many time has a doctor to register the sex of a baby in the United States? and in other countries?What do you mean? Do you mean before the baby is born? the sex of the baby isn't "registered" until after he/she is born. I should really hope that would only take one time.