Androstenedione - Definition

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Androstenedione is a steroidal hormone. It is made by the adrenal glands and the testicles in a man and by the adrenal glands and the ovaries in a woman. In women, it is transformed into estrogen and regulates hair growth, the functioning of genital organs, and perspiration. An over-abundance of androstenedione, often due to a hormonal abnormality, leads to a rise in the libido, hyperpilosity, acne, and a decrease in periods. In men, adrostenedione is transformed into testosterone.