Data from the National Population and Family Planning Commission reported that the sex ratio (M/F) at birth in China has remained high for more than 30 years. Since 2009, however, the ratio has seen four consecutive years of decline. According to data released by the National Bureau of Statistics, in 2012, the sex ratio at birth in China fell to 117.7 newborn boys to every 100 baby girls, from a high of 121.20 in 2004.
The sex ratio at birth is also called the infant sex ratio. Under normal circumstances, for every 100 girls born, there are 103 to 107 boys born. Since the mortality rate for boys is higher than for girls, the number of men and women tend to be equal by the time they reach the age for marriage and child-rearing. The sex ratio at birth in China climbed from 108.47 in 1982 to the record high of 121.20 in 2004. In 2009, the ratio started to decline and dropped to 119.45. The downward trend continued and dropped to 117.94 in 2010, 117.78 in 2011, and 117.7 in 2012. The current sex ratio is still hovering over 10 percentage points higher than the warning level.
Source: Xinhua, March 5, 2013