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The orchidometer can be used to accurately determine size of testes. Discrepancy of testicular size with other parameters of maturation can be an important clue to various diseases. Small testes can indicate either primary or secondary hypogonadism. Testicular size can help distinguish between different types of precocious puberty.
Due to natural variation, individuals pass through the Tanner stages at different rates, depending in particular on the timing of puberty.Among researchers who study puberty, the Tanner scale is commonly considered the "gold standard" for assessing pubertal status when it is conducted by a trained medical examiner. [5]
The correct final value from the calculation is compared with an age percentile table that shows how much a child exceeds the percentage of children his age for testicular volume. [4] Testicular volume changes throughout a male’s life and is as follows: [11] Childhood: 1 - 3 ml; Early adolescence (puberty begins, 10 to 13 years): 4 - 6 ml
In addition, testicular atrophy can be recognized as greater than 50% loss of testicular volume or a post-operative testicle with less than 25% of the volume of the opposite testicle. [23] Online calculators have been developed to estimate testicular volume based on sonographic measurements. [24]
Normal volume is 15 to 25 cm 3; the average is 18 cm 3 per testis (range 12–30 cm 3). [1] The number of spermatozoa an adult human male produces is directly proportional to testicular volume, as larger testicles contain more seminiferous tubules and Sertoli cells as a result. [3]
One difference between the glans penis and the glans clitoridis is that the glans clitoridis packs nerve endings into a volume only about one-tenth the size of the glans penis. Therefore, the glans clitoridis has greater variability in cutaneous corpuscular receptor density (1-14 per 100× high-powered field) compared with the glans penis (1-3 ...
The size of the testicles is among the parameters of the Tanner scale for male genitals, from stage I which represents a volume of less than 1.5 ml, to stage V which represents a testicular volume of greater than or equal to 20 ml. Testicular size reaches maximal adult size about 6 years after the onset of puberty.
Although it is possible for men to father children into old age, the genetic quality of sperm, as well as its volume and motility, all typically decrease with age. [2] Advancing paternal age has been implicated in a number of possible health effects. One particularly well-studied connection is the link between advancing age and autism. For ...