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  2. Age and female fertility - Wikipedia

    en.wikipedia.org/wiki/Age_and_female_fertility

    The average age of a girl's first period is 12 to 13 (12.5 years in the United States, [6] 12.72 in Canada, [7] 12.9 in the UK [8]) but, in postmenarchal girls, about 80% of the cycles are anovulatory in the first year after menarche, which declines to 50% in the third year, and to 10% by the sixth. [9]

  3. Male infertility - Wikipedia

    en.wikipedia.org/wiki/Male_infertility

    It is present in 15% of normal men and in about 40% of infertile men. It is present in up to 35% of cases of primary infertility and 69–81% of secondary infertility. [28] Hypogonadotropic hypogonadism due to various causes Obesity increases the risk of hypogonadotropic hypogonadism. [29]

  4. Female infertility - Wikipedia

    en.wikipedia.org/wiki/Female_infertility

    Men and women can also turn to divorce in attempt to find a new partner with whom to bear a child. Infertility in many cultures is a reason for divorce, and a way for a man or woman to increase his/her chances of producing an heir. [63] [65] [67] [70] When a woman is divorced, she can lose her security that often comes with land, wealth, and a ...

  5. 4 possible modern-day factors behind infertility - AOL

    www.aol.com/finance/4-possible-modern-day...

    In the U.S., approximately 12.7% of reproductive age women seek infertility treatment every year. But that statistic excludes men with infertility issues, which is just one of many reasons actual ...

  6. Infertility - Wikipedia

    en.wikipedia.org/wiki/Infertility

    In humans, infertility is the inability to become pregnant after at least one year of unprotected and regular sexual intercourse involving a male and female partner. [2] There are many causes of infertility, including some that medical intervention can treat. [ 3 ]

  7. Here's Why Testosterone Is a Female Hormone, Too - AOL

    www.aol.com/heres-why-testosterone-female...

    Casperson agrees that more studies are needed but points out that there is actually 30 years of safety data on people who’ve taken testosterone: transgender men. “They’re not dying of cancer ...

  8. Men share their experiences with male infertility: 'I was in ...

    www.aol.com/lifestyle/men-share-experiences-male...

    "The most common thing that causes infertility in men is a condition that's called varicose veins in the scrotum," Goldstein says. That was the issue for Joshua Kaiser of Texas. After getting ...

  9. Fertility - Wikipedia

    en.wikipedia.org/wiki/Fertility

    Men are fertile continuously, but their sperm quality is affected by their health, frequency of ejaculation, and environmental factors. [24] Fertility declines with age in both sexes. For women, the decline begins around the age of 32, and becomes precipitous at age 37. For men, potency and sperm quality begins to decline around the age of 40.