Chinese prosecutors recently filed lawsuits against at least 16 companies accused of requiring female jobseekers to undergo pregnancy testing.

Chinese law explicitly prohibits employers from carrying out pregnancy tests as part of pre-employment examinations, but some companies are so worried about the costs of maternity leave and benefits that they prefer to make sure the women they hire are not pregnant. Earlier this month, prosecutors in the Tongzhou district of Nantong, China’s Jiangsu Province, announced that it had sued 16 companies for illegally testing female job applicants for pregnancy without even formally informing them about it. Their investigation revealed that companies violated women’s right to equal employment opportunities, as at least one candidate was rejected after it was revealed that she was pregnant.