| 摘要 |
This invention is directed to the use of alkylureas, such as butylurea, ethylurea, propylurea or methylurea, and to the use of hydroxyurea as contraceptive agents. Alkylureas and/or hydroxyurea may be used either alone or with a pharmaceutically accept- able carrier, and may be used in conjunction with conventional contraceptive means to abrogate sperm motility.
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