What is in a males sperm

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Sperm competition is the competitive process between spermatozoa of two or more different males to fertilize the same egg [1] during sexual reproduction. Competition can occur when females have multiple potential mating partners. Greater choice and variety of mates increases a female's chance to produce more viable offspring. Sperm competition is an evolutionary pressure on males, and has led to the development of adaptations to increase males' chance of reproductive success. Sperm competition is often compared to having tickets in a raffle ; a male has a better chance of winning i. However, sperm are not free to produce, [7] and as such males are predicted to produce sperm of a size and number that will maximize their success in sperm competition.
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Is There an Age Limit to Male Fertility?

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Pre-ejaculate - Wikipedia

Nearly 1 in 7 couples is infertile, which means they haven't been able to conceive a child even though they've had frequent, unprotected sexual intercourse for a year or longer. In up to half of these couples, male infertility plays at least a partial role. Male infertility can be caused by low sperm production, abnormal sperm function or blockages that prevent the delivery of sperm. Illnesses, injuries, chronic health problems, lifestyle choices and other factors may contribute to male infertility. The inability to conceive a child can be stressful and frustrating, but a number of treatments are available for male infertility. The main sign of male infertility is the inability to conceive a child.
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Sperm competition

Male fertility does change with age. You might get the impression that age only matters in female fertility. While the change in fertility is more drastic in women, men have biological clocks, too. The study looked at everything a semen analysis would, including how often they had sex. This is important to consider because sexual abstinence can lower semen quality.
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Most people want to have children sometime in their life and expect this will happen when the time is right for them. Age has a significant impact on fertility and the chance of having a healthy baby. In women, fertility starts to decline slowly in their early thirties and this decline speeds up after While most people might think age only affects female fertility, there is growing evidence that sperm quality decreases as men age, starting at around Women with male partners aged 45 or older are almost five times more likely to take more than a year to conceive compared to those with partners aged in their twenties.
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Video сomments (17)

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