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在生育问题上,科学家们的着眼点是遗传。法国遗传学家摩里士的研究成果表明,年龄在30～35岁的男人所生育的后代是最优秀的。摩里士说,男性精子素质在30岁时达高峰,然后能持续5年的高质量。
On fertility issues, scientists focus on inheritance. The research by the French geneticist Morris shows that the offspring born to men aged 30 to 35 are the best. Morris says the male sperm quality peaks at the age of 30 and can last for 5 years of high quality.