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审稿专家：高芹 | 山东大学附属生殖医院生殖中心主任医师

参考文献

[1]Holesh JE, Bass AN, Lord M. Physiology, Ovulation. In: StatPearls. Treasure Island (FL): StatPearls Publishing; May 9, 2021.

[2]Clubb E. Natural methods of family planning. J R Soc Health. 1986;106(4):121-126. doi:10.1177/146642408610600402

[3]https://www.mayoclinic.org/healthy-lifestyle/getting-pregnant/expert-answers/pregnancy/faq-20058504

[4]Bellastella G, Cooper TG, Battaglia M, et al. Dimensions of human ejaculated spermatozoa in Papanicolaou-stained seminal and swim-up smears obtained from the Integrated Semen Analysis System (ISAS(®)). Asian J Androl. 2010;12(6):871-879.

[5]Bouvet JP, Grésenguet G, Bélec L. Vaginal pH neutralization by semen as a cofactor of HIV transmission. Clin Microbiol Infect. 1997;3(1):19-23.

[6]https://www.givelegacy.com/resources/how-much-semen-does-it-take-to-get-pregnant/

[7]https://en.wikipedia.org/wiki/Egg_cell

[8]Sun QY. Cellular and molecular mechanisms leading to cortical reaction and polyspermy block in mammalian eggs. Microsc Res Tech. 2003;61(4):342-8.

[9]https://en.wikipedia.org/wiki/Embryonic_development

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