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Gynecomastia can be normal in newborn male babies due to exposure to estrogen from the mother, in adolescent boys going through puberty, in older men over the age of 50, and in obese men. [4] Most occurrences of gynecomastia do not require diagnostic tests.
Suppression of estrogen receptors in the ventromedial nucleus of the hypothalamus in female rats has been observed to reduce female proceptivity and receptivity. [16] Proceptivity and receptivity in the female rat are indicators of sexual motivation, thus indicating a direct relationship between estrogen levels and sexual motivation.
Some researches shows gross measures of body strength suggest that females are approximately 50-60% as strong as males in the upper body, and 60-70% as strong in the lower body. [31] One study of muscle strength in the elbows and knees —in 45 and older males and females—found the strength of females to range from 42 to 63% of male strength ...
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If you suspect your estrogen levels are high or simply want to get tested, a gynecologist, endocrinologist, or primary care physician can order a blood test to measure your levels, says Dr. Woo ...
In addition, both men and women experience increased prolactin levels following orgasm for approximately 60 minutes, which is a neurobiological marker of the refractory period in males. [14] [9] Like men, it may be that only a minority of women are capable of multiple orgasms or lack a refractory period, but there is insufficient data to make a ...
Estrogen, at some concentration, has been found to be essential for male fertility/spermatogenesis. [67] [68] However, estrogen levels that are too high can impair male fertility by suppressing gonadotropin secretion and thereby diminishing intratesticular androgen levels. [62]
A substantial product of testosterone metabolism in males is the estrogen estradiol. The conversion of testosterone to estradiol depends on the amount of body fat and estradiol levels in males are typically much lower than in females. The male "growth spurt" also begins later, accelerates more slowly, and lasts longer before the epiphyses fuse.