By continuing to browse this site you agree to our use of cookies. Ceci se produit à cause des hauts niveaux des hormones femelles dans la mère pendant la grossesse qui continuent à stimuler le tissu de sein dans le nouveau-né. Gynecomastia is thought to be caused by an altered ratio of estrogens to androgens mediated by an increase in estrogen production, a decrease in androgen production, or a combination of these two factors. Dr. Liji Thomas is an OB-GYN, who graduated from the Government Medical College, University of Calicut, Kerala, in 2001. Ce site Web et ses pages Web sont destinés à être lus en anglais. Dans chacun des trois cas elle est due aux taux d'oestrogène relativement élevés.Dans les nouveaux-nés, le développement des seins peut être accompagné de sécrétion de lait. This is probably due to their weak estrogenic activity.Gynecomastia has few physical complications, but it can cause psychological or emotional problems caused by appearance.There are a few factors you can control that may reduce the risk of gynecomastia:Mayo Clinic does not endorse companies or products. The decrease can be caused by conditions that block the effects of testosterone, reduce testosterone or increase your estrogen level.Several things can upset the hormone balance, including the following.The hormones testosterone and estrogen control sex characteristics in both men and women. All rights reserved. Gynecomastia can affect one or both breasts, sometimes unevenly. This tumor causes the overproduction of the hormone prolactin, a hormone that helps control sexual function. Causes. La gynécomastie est une condition caractérisée par le développement des seins agrandis dans les mâles. Gynecomastia or more commonly known as “man boobs” is the abnormal enlargement of breast tissues in males due to an underlying endocrine system disorder. Besides from the hormonal imbalance that is common in newborns and pubescent males, there are several other factors that can lead to the development of gynecomastia. There are some men in whom gynecomastia occurs due to various health conditions such as, Hypogonadism Une augmentation de ces hormones pendant la puberté est ainsi normale, et peut être accompagnée de développement de bourgeon de sein dans les garçons pubertaires dans jusqu'à 60% de cas.Les hommes agés développent souvent la gynécomastie à cause des déclins âge-dépendants aux taux de testostérone, qui mène à une augmentation comparative d'activité estrogenic sur le tissu de sein.Quelques médicaments ont été connus pour être liés à la gynécomastie, par plusieurs mécanismes tels que leurs propriétés estrogenic, stimulation de production d'oestrogènes dans le fuselage, ou molécules fournisseuses qui sont facilement converties en oestrogène. Male estrogen levels that are too high or are out of balance with testosterone levels can cause gynecomastia.A number of medications can cause gynecomastia. Avertissement : Cette page est une traduction automatique de cette page à l'origine en anglais. The enlargement is from an imbalance between testosterone (male hormone) and estrogen (female hormone). Newborns, boys going through puberty and older men may develop gynecomastia as a result of normal changes in hormone levels, though other causes also exist. Men and boys with gynecomastia sometimes have pain in their breasts and may feel embarrassed.Gynecomastia may go away on its own. A single copy of these materials may be reprinted for noncommercial personal use only. In men, prolactin-producing tumors may cause gynecomastia, erectile issues or impotence, infertility, a reduction in body hair, and a low sex drive. Enlarged breasts in men (gynecomastia) Advertising revenue supports our not-for-profit mission.Check out these best-sellers and special offers on books and newsletters from Mayo Clinic. News-Medical. Many health conditions that inhibit the production of testosterone, leading to an imbalance of hormones, cause Gynecomastia.