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In humans, infertility is the inability to become pregnant after 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 ]
Female infertility refers to infertility in women. It affects an estimated 48 million women, [2] with the highest prevalence of infertility affecting women in South Asia, Sub-Saharan Africa, North Africa/Middle East, and Central/Eastern Europe and Central Asia. [2] Infertility is caused by many sources, including nutrition, diseases, and other ...
Age and female fertility. Female fertility is affected by age and is a major fertility factor for women. A woman's fertility is in generally good quality from the late teens to early thirties, although it declines gradually over time. [1] Around 35, fertility is noted to decline at a more rapid rate. [1] At age 45, a woman starting to try to ...
Male infertility refers to a sexually mature male's inability to impregnate a fertile female. [1] In humans, it accounts for 40–50% of infertility. [2][3][4][5] It affects approximately 7% of all men. [6] Male infertility is commonly due to deficiencies in the semen, and semen quality is used as a surrogate measure of male fecundity. [7]
In medicine, fertility refers to the ability to have children, and infertility refers to difficulty in reproducing naturally. [3] In general, infertility or subfertility [4] in humans is defined as not being able to conceive a child after one year (or longer) of unprotected sex. [5]
Genetics of infertility. 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 ...
Human growthand development. Human fertilization is the union of an egg and sperm, occurring primarily in the ampulla of the fallopian tube. [1] The result of this union leads to the production of a fertilized egg called a zygote, initiating embryonic development. Scientists discovered the dynamics of human fertilization in the 19th century.
Assisted reproductive technology (ART) includes medical procedures used primarily to address infertility. This subject involves procedures such as in vitro fertilization (IVF), intracytoplasmic sperm injection (ICSI), cryopreservation of gametes or embryos, and/or the use of fertility medication. When used to address infertility, ART may also ...