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  2. Male infertility - Wikipedia

    en.wikipedia.org/wiki/Male_infertility

    Male infertility can wholly or partially account for 40% of infertility among couples who are trying to have children. [2] It affects approximately 7% of all men. [3] Male infertility is commonly due to deficiencies in the semen, and semen quality is used as a surrogate measure of male fecundity. [4]

  3. Spermarche - Wikipedia

    en.wikipedia.org/wiki/Spermarche

    Spermarche, also known as semenarche, is the time at which a male experiences his first ejaculation. [1] It is considered to be the counterpart of menarche in females. [2] [3] Depending on upbringing, cultural differences, and prior sexual knowledge, males may have different reactions to spermarche, ranging from fear to excitement. [4]

  4. Spermatogenesis - Wikipedia

    en.wikipedia.org/wiki/Spermatogenesis

    The process of spermatogenesis as the cells progress from primary spermatocytes, to secondary spermatocytes, to spermatids, to Sperm Cycle of the seminiferous epithelium of the testis. Spermatocytogenesis is the male form of gametocytogenesis and results in the formation of spermatocytes possessing half the normal complement of genetic material.

  5. Bulbourethral gland - Wikipedia

    en.wikipedia.org/wiki/Bulbourethral_gland

    According to one preliminary study, the bulbourethral gland fluid might not contain any sperm, [10] whereas another study showed some men did leak sperm in potentially significant quantities (in a range from low counts up to 50 million sperm per ml) into the pre-ejaculatory fluid, [9] potentially leading to conception from the introduction of ...

  6. Mild androgen insensitivity syndrome - Wikipedia

    en.wikipedia.org/wiki/Mild_androgen...

    Mild androgen insensitivity syndrome (MAIS) is an intersex variation that results in a mild impairment of the cell's ability to respond to androgens. [1] [2] [3] The degree of impairment is sufficient to impair spermatogenesis and / or the development of secondary sexual characteristics at puberty in males, but does not affect genital differentiation or development.

  7. Klinefelter syndrome - Wikipedia

    en.wikipedia.org/wiki/Klinefelter_syndrome

    The rate of Klinefelter syndrome among infertile males is 3.1%. The syndrome is the main cause of male hypogonadism. [68] One survey in the United Kingdom found that the majority of people with KS identify as male, however, a significant number have a different gender identity. [69] The prevalence of KS is higher than expected in transgender ...

  8. Human reproduction - Wikipedia

    en.wikipedia.org/wiki/Human_reproduction

    The male reproductive system contains two main divisions: the testicles where sperm are produced, and the penis where semen is ejaculated through the urethra. In humans, both of these organs are outside the abdominal cavity. Having the testicles outside the abdomen facilitates temperature regulation of the sperm, which require specific ...

  9. Male genital examination - Wikipedia

    en.wikipedia.org/wiki/Male_genital_examination

    Male genital examination is a physical examination of the genital in males to detect ailments and to assess sexual development, and is normally a component of an annual physical examination. The examination includes checking the penis , scrotum , and urethral meatus . [ 1 ]