Study Looks at China’s Slowing Birth Rate

China’s one-child-per-family policy has cut the country’s birth rate, with males clearly outnumbering females there, according to a study in the British Medical Journal.

Using data from nearly 40,000 women, it found the birth rate had dropped from 2.9 before the policy was introduced in 1979 to 1.94 in women older than 35 and 1.73 in women younger than 35. It also concluded that the male-to-female imbalance has risen from 1.11 in 1980-89 to 1.23 in 1996-2001.