Most young men are curious, and always secretly compare penis size with people around them when taking a bath. Once you find that your penis is shorter than others', you will cast a shadow on your heart, feel ashamed, feel inferior and depressed, and never want to go to the public bathroom or swimming pool again. Is the problem really that serious?
To answer similar questions, we must first make clear how abnormal the penis is. Secondly, it is necessary to find out whether it is abnormal development or individual differences within the normal range. Finally, it is also the most important thing that everyone cares about. If the penis is slightly smaller, will it affect normal sexual life? That is, can you make your wife happy?
A man's penis is different from his height, fat and thin, and his facial features are different, with different lengths and uneven thickness. Shi has measured the penis size of China 14 12 healthy young men and the penis erection length of 126 healthy men. The results show that the longest is 14.5 cm, the shortest is 4 cm, and the average is 8.375 cm. Maximum circumference 12 cm, minimum 4.5 cm, average 8.3 cm. The longest 16 cm and the shortest 12 cm during erection. Maximum circumference during erection 14 cm, minimum 8 cm, average10.75cm.. The penis length of 1000 normal adult males investigated by Liu Guozhen et al. is: the normal length is 4.9 ~ 8.6 cm, with an average of 6.55 cm, the longest is 10.6 cm, and the shortest is 3.7 cm. Wu Weicheng and others measured the penises of 2547 male college students aged 16-40, with an average length of 7.43 cm and an average circumference of 8. 17 cm. The average penis elongation is 13.34 cm, which is close to the calculated erection length 13.08 cm, so the elongation can represent the length after erection. It can be seen that there are some differences in the measurement results of different authors, and the results are also influenced by regions and nationalities. In addition, the penis length of the same person is not constant under normal circumstances, such as tension, cold or severe fatigue, which will shorten the penis. In addition, the measurement methods themselves are quite different, so it is difficult to judge whether the penis is normal simply from the length. Therefore, the above figures can only be used as a reference, and never try to compare your own length. Clinicians are never willing to judge whether it is normal by the length of penis. As long as you can have normal sexual intercourse, it is normal to complete the task of giving birth. Otherwise, this family would have been eliminated.
In order to further explain the reasons why penises are big and small, let's review the occurrence and development of penises together. For the convenience of narration, we divide it into four stages:
(1) During pregnancy 10- 12 weeks, the penis just differentiated and was only 3.5 mm long. At this time, testosterone is produced under the action of hCG secreted by placenta.
(2) In the second and third trimester of pregnancy, the penis grows rapidly, reaching 2.5-3.5 cm at birth. At this time, the fetal pituitary gland begins to secrete gonadotropins LH and FSH.
(3) From birth to adolescence (about 7 years old), the penis grows slowly, which is because the hypothalamus and pituitary gland develop slowly and the testosterone level is low.
(4) After puberty, the pituitary and testosterone are vigorous, and the penis grows rapidly. It takes only about 5 years to reach the adult level, and the growth becomes thicker. When the hormone level of the elderly is obviously reduced or after surgical castration, the penis can be secondary degeneration. If secondary impotence stops sexual contact for many years, it may also cause pathological degeneration, which is not a problem of using it and discarding it, but the result of smooth muscle fiber degeneration.
In short, the differentiation and development of penis depends entirely on the testosterone level in the body. If the testosterone secretion is insufficient in the sixth to ninth month of pregnancy, and the penis development is lower than normal, the penis will become smaller at birth.
So, what is a real penis? The penis is shorter than 2.5 cm before puberty and 5 cm after puberty, with abnormal development and no erectile function; Especially the secondary sexual development, sexual dysfunction, infertility and azoospermia. At this time, it can be considered as abnormal penile development. The causes of true penis include:
(1) The lesion originated from hypogonadism caused by high gonadotropin in testis. At this time, the hypothalamus and pituitary gland are normal, and powerful instructions can be issued, but the testicles are sick, and the orders to produce sex hormones and sperm cannot be executed.
(2) Hypogonadism caused by hypogonadism. This is because the hypothalamus and pituitary gland are diseased, and it is impossible to issue instructions to secrete testosterone downward. The above two diseases have been introduced separately in this book.
(3) Partial antiandrogen syndrome, that is, the penis is insensitive to androgen, and the patient's testosterone level is normal, but the secondary sexual characteristics are abnormal, and even hypospadias may occur.
(4) Idiopathic penis, the cause of which is still unknown.
Let's go back to the woman in front. Because she got pregnant about 9 months after marriage and gave birth to a son safely, it shows that her husband's sexual function is normal and there will never be endocrine problems. His penis obviously belongs to the normal range. There is no need to worry about this normal physiological difference. As for women's sexual satisfaction and sexual harmony between the two sides, it is mainly caused by factors such as lack of sexual knowledge and skills, and has nothing to do with penis size. By the way, the measurement method of penis length is very important, one is to measure the weakness state, the other is to measure the change of erection state. When measuring, the room temperature should be about 25℃. When you are calm and have a proper rest, lift the penis horizontally with your hands, gently press the pubic symphysis with one end of the hard ruler, and compress the subcutaneous fat layer as much as possible. The other end is based on the external orifice of glans urethra, and the number read out is the normal length of the penis. Then measure the circumference of the penis with a tape measure at a distance of 1 cm from the crown edge. Because patients are nervous or do not adapt to the environment of the consulting room, they often can't get an erection in front of doctors, so the pulling length of penis is often used instead of the erection length.