從魚的人工孵卵術和馬的人工妊娠術講起精子和卵的性質明瞭以後,就可以研究人工繁殖法了。所謂“人工繁殖”,是不讓雄性的精子和雌性的卵僅為天然的配合,而加以人工的補助,使动物的繁殖率特别增高的意思。动物的人工繁殖法中,研究最早的是魚類的人工孵卵術;其次是馬 From the artificial hatching of fish and the artificial pregnancy of horses, after the nature of sperm and eggs is known, artificial breeding can be studied. The so-called “artificial reproduction” means that the sperm of a male and the female egg are artificially supplemented only by natural means, so that the reproduction rate of the animal is particularly increased. In the artificial propagation of animals, the earliest study was the artificial incubation of fish; followed by horses.