The standard of the penis

To answer a similar question, first of all to clear what the penis is not normal? Second, we must understand is the development of abnormal or normal range of individual differences? Finally, we are most concerned about and most important, if smaller penis, which will not affect the normal sex life? That is, so his wife can get pleasure? Human penis size and height, Pan Shou, the same facial features, such as the size of the existence of a large number of differences, of varying lengths, uneven thickness. Shi national ceremony has been 1412 cases of determination of the health of China's young male penis size and 126 healthy male erectile length. The results show that when the normal maximum of 14.5 cm, 4 cm minimum, an average of 8.375 cm; the largest circumference of 12 centimeters, 4.5 centimeters minimum, an average of 8.3 cm. When the maximum 16 centimeters ED, the shortest 9 cm, 12 cm on average; erection at the largest circumference of 14 cm, the smallest 8 cm, 10.75 cm on average. Liu Guozhen, and other investigations of 1000 cases of normal adult male penis length: Under normal length of the range of 4.9-8.6 cm, 6.55 cm on average, up to 10.6 centimeters, 3.7 centimeters minimum. Wu Weicheng, and so on the 2547 case of 16-40 year-old male college students measurements of the penis, the average length of 7.43 cm, the average circumference 8.17 cm; penis led an average of 13.34 centimeters long, and calculate the length of the erection of 13 .08 Cm similar, it may lead to consider on behalf of the length of the post-erection. The author shows that different measurement results are also certain differences, the result was also affected by regional, national and so on. In addition, the same person under the normal length of the penis is not constant, such as tension, fatigue or severe cold can make when the shortening of the penis. Combined with the measurement methods are very different from themselves, it is difficult to judge purely on the length of the penis is not normal. As a result, the above-mentioned figures only as a reference, not hard to control how their length. Clinicians also do not want to determine whether the normal length of the penis. So long as the normal sexual intercourse, to complete the task of having children is normal. Otherwise, the family has long been eliminated. In order to further large or small penis reasons, or let us look at the occurrence of the penis and development. In order to facilitate the description, we divide it into four phases: (1) the first 10-12 weeks of pregnancy, just divide the penis, and only 3.5 mm long, then the role of the placenta in the secretion of hCG arising under the testosterone. (2) pregnancy, 6 months late, the fast growth of the penis, has reached 2.5-3.5 cm at birth, when fetal pituitary gonadotropin secretion of LH and the beginning of FSH. (3) after birth to pre-adolescence (about 7 years old), the slow growth of the penis, this is because the hypothalamus, pituitary slow growth, low testosterone levels because. (4) the beginning of puberty, the pituitary hormone testosterone and vigorous, rapid growth of the penis, only 5 years to reach adult levels, an increase of enlargement. When the elderly a significant reduction in the level of sex hormones or surgical castration, the penis can be secondary degradation. If the secondary impotence to stop sexual contact for many years, may also cause pathological degradation, it is not generally mentioned by disuse, but the occurrence of degenerative changes in the smooth muscle fibers of the consequences. In short, the penis of differentiation and development depend on the level of testosterone in the body, if the first 6-9 months of pregnancy, inadequate secretion of testosterone, lower than the normal rate of growth of the penis, penis would be smaller at birth. In that case, what is it really a small penis? In the pre-adolescent penis less than 2.5 cm, after puberty shorter than 5 cm, and abnormal development, there is no erectile function; in particular the development of non-performing secondary sexual characteristics, sexual dysfunction, without fertility, without sperm, this time to Can be considered to be abnormal development of the penis. Lead to the real cause of the small penis include:(1) changes in the primary testicular gonadotropin-gonadal function of the high-low disease, when the normal hypothalamus and pituitary, to send a strong command, but the testes sick, unable to perform the production of sex hormones and sperm of the order. (2) gonadal Gonadotropin low hypoparathyroidism because of the hypothalamus and pituitary disease there, the secretion of testosterone can not be sent down orders. These two diseases in this book have been introduced. (3) part of the anti-androgen syndrome, that is, the penis of androgen insensitivity, in patients with normal levels of testosterone in the body, but abnormal secondary sexual characteristics, and may even have hypospadias. (4) idiopathic small penis, so far unknown reason. Let us go back in front of women who, because of her marriage in about 9 months pregnant and gave birth to a son safely on her husband's sexual function properly, will never exist, and other endocrine problems, the penis is clear that normal范围. For such a completely normal physiological differences do not have to worry while that of female sexual satisfaction and harmony between the two sides of the main problems is the knowledge and skills of the poor, and other factors, has nothing to do with the size of the penis. By the way, the measurement of the length of the penis is very important, first, measuring a weak state, and the other is measured when the state of erection. When measured at room temperature should be around 25 ° C, to be calm and good rest after the hand-carried to the penis, with a hard foot a little hard to stand up at one end of the pubic symphysis, to cut subcutaneous fat layer, the other side of the glans penis to urethra outside I as a benchmark by which to read out the number under the normal length of the penis. Tape measure from coronary reused in the margin of 1 cm cadres of the penis circumference measured. As the tension or not meet the patient's room, they can not be more than an erection in front of the doctor, it is commonly used to replace the length of the stretch of the penis erection length.