1979: The introduction, in 1979, of a one-child family policy in China was followed by more intrusive birth control measures that reached a peak in 1983. The number of abortions increased from 5.4 million in 1978 to 14.4 million in 1983, while sterilisations jumped from 3.3 million to 20.8 million. Women bore the brunt: female sterilisations outnumbered male sterilisations by three to two in 1973; by 1985, four times as many women as men were operated on; in 2000, the ratio was more than five to one.
Source: Susan Greenhalgh and Edwin A. Winckler, Governing China’s Population: From Leninist to Neoliberal Biopolitics (2005), pp. 255–61