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In approximately one-third of these cases the man is the factor, in one third the woman is the factor, and in the remaining third the infertility is a product of factors on both parts. In many lower-income countries, estimating infertility is difficult due to incomplete information and infertility and childlessness stigmas .
20-30% percent of infertility cases are due to male infertility, 20–35% are due to female infertility, and 25-40% are due to combined problems. [13] In 10–20% of cases, no cause is found. [13] The most common cause of female infertility is ovulatory problems, which generally manifest themselves by sparse or absent menstrual periods. [60]
A clinical definition of infertility by the WHO and ICMART is "a disease of the reproductive system defined by the failure to achieve a clinical pregnancy after 12 months or more of regular unprotected sexual intercourse." [58] Infertility can further be broken down into primary and secondary infertility.
In medicine, fertility refers to the ability to have children, and infertility refers to difficulty in reproducing naturally. [4] In general, infertility or subfertility [5] in humans is defined as not being able to conceive a child after one year (or longer) of unprotected sex. [6]
About 10–15% of human couples are infertile, unable to conceive.In approximately in half of these cases, the underlying cause is related to the male. The underlying causative factors in the male infertility can be attributed to environmental toxins, systemic disorders such as, hypothalamic–pituitary disease, testicular cancers and germ-cell aplasia.
Testicular infertility factors (8 P) V. ... 6 P) Pages in category "Male infertility" The following 3 pages are in this category, out of 3 total. ... Wikipedia® is a ...
The male infertility crisis is an increase in male infertility since the mid-1970s. [91] The issue attracted media attention after a 2017 meta-analysis found that sperm counts in Western countries had declined by 52.4 percent between 1973 and 2011.
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