狼群 发表于 2025-3-26 21:23:47
http://reply.papertrans.cn/23/2244/224305/224305_31.pngpus840 发表于 2025-3-27 03:11:26
https://doi.org/10.1007/978-1-4302-7241-0with all the disadvantages of the continuously administered contraceptive regimens. In the middle-aged and older groups, however, in which sexual activity is usually less frequent, a postcoital contraceptive would have the definite advantage of lowered drug intake.步兵 发表于 2025-3-27 07:09:51
Shapes, Brushes, and Transforms,d by Brinster, 1970) and has been recently achieved in man (Edwards, Bavister, and Steptoe, 1969), it should be possible to study not only the morphology, motility, and longevity of ejaculated spermatozoa, but more importantly, their fertilizing capacity before and after treatment with possible chemical antifertility agents.Paleontology 发表于 2025-3-27 10:15:24
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