A hormone that promotes the development and maintenance of male sex characteristics.
An androgen (steroid hormone) that is biochemically synthesized (made) from androstenedione, which is itself synthesized from progesterone. Testosterone is responsible for the development of male secondary sex characteristics in humans such as greater strength, larger body size, facial hair and a deeper voice, etc.
The principal male sex hormone that induces and maintains the changes that occur in males at puberty. In men, the testicles continue to produce testosterone throughout life, though there is some decline with age.
Male reproductive hormone secreted by the seminiferous tubules and is responsible for the development of the secondary sex characteristics. Increased levels of inhibit the anterior pituitary gland.
A male sex hormone, secreted by the Leydig cells in the testes, which causes physical changes, e.g. the development of body hair and a deep voice, to take place in males as they become sexually mature.
Testosterone is an androgenic steroid hormone ultimately synthesized from cholesterol. It is especially important for male reproduction and development of typical male characteristics.
One of the key male sex hormones, produced by the testes (and in women, the ovaries, though only in tiny amounts). Testosterone helps stimulate bone and muscle development and also triggers the appearance of secondary sex characteristics. Synthetic or animal forms of the hormone are used to treat some kinds of infertility. As a form of steroid, testosterone is sometimes used by athletes to stimulate growth and development; in women, it leads to development of male characteristics, such as hair growth and voice deepening. More serious effects of testosterone can include liver damage and exacerbation of cancer in the male reproductive system.
Male sex hormone, produced chiefly in the testes, but also in small amounts in the adrenal glands and in the ovaries of women. It is responsible for the development of male secondary sex characteristics (e.g., deep voice and facial hair). Preparations of testosterone are used in the treatment of deficiency conditions, breast cancer in women, and certain other conditions. Adverse effects of the use of these preparations include fluid retention, masculinization in women, and acne.
A male sex hormone present in blood; important in diagnosing poor function of the testes (decreased level) and testicular cancer (increased level).
The primary male reproductive hormone, one of the androgen hormones, produced primarily within the cells inside the testicles. Testosterone circulates within the bloodstream and is critically important to the maintenance of male reproductive and sexual development and function. It has an important role in a man’s bone and muscle growth, as well as in typical male physical characteristics, including facial hair, deepening of the voice, and increased muscle mass.
The principal male sex hormone.
The principal male sex hormone secreted by the testes. It has also been prepared synthetically and has the formula C19,H28,O2. In true male hypogonadism it has the power of restoring male sexual characteristics.
A steroid sex hormone that is responsible for the growth and development of masculine characteristics. It directly influences the maturation of male sexual organs, development of sperm within the testes, sexual drive, erectile function of the penis, and male secondary sexual characteristics (facial hair, thickened vocal cords, and pronounced musculature). In addition, it is linked to aggressive and predatory behaviors.
The male hormone that is made by the testes and that regulates male secondary sex characteristics and the production of sperm.
A hormone that promotes the development and maintenance of male sex characteristics.
A hormone produced by the testes that affects the production of sperm, the development of male secondary sex characteristics, and the sex drive.
Male hormone that women produce in the ovaries and the adrenal glands; thought to help with sex drive and muscle strength.
Testosterone is a steroidal androgen hormone that originates from the Leydig cells of the testicles. Its main function is to promote the differentiation and growth of the male genitalia, as well as the development of secondary sexual characteristics, such as a deep voice, facial and body hair growth, and increased muscle mass. Additionally, testosterone also stimulates spermatogenesis, which is the process of producing spermatozoa.
A hormonally active compound synthesized in the testes of males, accountable for the emergence and maturation of secondary sexual traits.
The primary androgen hormone, responsible for male characteristics. It fosters bone and muscle development, as well as sexual maturation. While the testes are the primary source, the ovaries produce trace amounts. Synthetic or animal-derived testosterone is employed to induce puberty in delayed cases or to address specific types of male infertility.
The male sex hormone, produced in the testicles, is responsible for secondary sex characteristics like beard growth. It can also be synthesized in labs without using animal extracts.