| Geburtsdatum | Freitag, 18. Juni 1954 | 
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| Beschreibung | Chuen Yan Cheng (Chinese: 鄭泉恩) is a Senior Scientist for the Population Council's Center for Biomedical Research. He is most well known as the inventor of the non-steroid male contraceptive drug——Adjudin, which is the first male contraceptive drug on the market now finished clinical trials showing no side effects. |