Is there any scientific basis for this?

For men aged 18-25, 10-30 times per month; for those aged 25-35, 5-15 times per month; and for those aged 35-45, 2-10 times per month. A normal person produces 30 million sperm daily. Frequent intercourse can reduce sperm count, resulting in a lower proportion of Y sperm. Longer intervals between intercourse can increase sperm count, leading to a higher proportion of Y sperm. Therefore, those wanting a boy should have longer intervals between intercourse to improve semen quality and concentration. Those wanting a girl do not need to restrict the interval between intercourse. Is this true?

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Is there any scientific basis for this?

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