To get an accurate answer, you really need to
direct it to an organization such as International
Planned Parenthood Federation or the International
Women's Health Coalition.
I do know that China has a one child policy to
help curb their
population but I don't know what ethnic groups
enforce this. It has also been suggested that
female children were aborted at a greater rate
than males, but that should be confirmed with
one of the above mentioned groups.