From the late 1970s until 2015, China allowed most couples to have only one child. Since 2015, most couples have been permitted two children.
The Washington Post reported in October 2019 that women in Kazakhstan who say they had been detained in Xinjiang said they were forced to have abortions, had contraceptive devices implanted involuntarily, or were raped.
Other commonly cited reasons for internment in the document were that the persons were untrustworthy (116 persons), religion-related (101), and that they had overseas links (94).
Only 24 had committed a formal crime.
Zenz has also said that sterilizations in Xinjiang rose from fewer than 50 per 100,000 people in 2016, to nearly 250 per 100,000 in 2018.
And in 2018, IUDs were implanted at a rate of nearly 1,000 per 100,000 people in Xinjiang, while the rate for China in the same year was 21 per 100,000.
The birth rate in Xinjiang plunged by 24% in 2019, the AP said, and in certain parts of the region birth rates had fallen by more than 60% from 2015 to 2018.
The region's government told CNN: "As a part of China, Xinjiang implements family planning policies in accordance with national laws and regulations, and has never formulated and implemented family planning policies for a single ethnic minority."
Uyghurs make up about 46% of Xinjiang's population; Han Chinese 39%, Kazakhs 7%, and Huis 5%. A large number of minorities make up the remaining 3%.
The Chinese government has defended its policy of mass detention and re-education as an appropriate measure against terrorism.
The government at one time denied the camps even existed, but has since shifted to defending its actions as a reasonable response to a national security threat.
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Government officials from the region said in July 2019 that the area's re-education camps for Muslims have been successful, with most of those held having been reintegrated into Chinese society.
Uyghurs can be arrested and detained under vague anti-terrorism laws. Violence in the region escalated in the 1990s and again in 2008.
In July the Trump administration put travel and asset sanctions on several senior officials of the Chinese Communist Party in Xinjiang for their role in the mass internment of Uyghurs.
"The United States will not stand idly by as the CCP carries out human rights abuses targeting Uyghurs, ethnic Kazakhs, and members of other minority groups in Xinjiang, to include forced labor, arbitrary mass detention, and forced population control, snd attempts to erase their culture and Muslim faith," US Secretary of State Mike Pompeo announced July 9.
The US Commerce Department in October 2019 added 28 Chinese organizations to a blacklist barring them from buying products from US companies, saying they cooperate in the detention and repression of the Uyghurs.