Sex-selective abortion is the practice of terminating a pregnancy based upon the predicted sex of the infant. The selective abortion of female fetuses is most common where male children are valued over female children, especially in parts of East Asia and South Asia (particularly in countries such as People's Republic of China, India and Pakistan), as well as in the Caucasus, Western Balkans, and to a lesser extent North America. According to demographic scholarship, the expected birth sex ratio range is 103 to 107 males to 100 females at birth.