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| Genes |
 The material carrying a person's hereditary (genetic) information. They are contained in the chromosomes in the form of spiral molecules of deoxyribonucleic acid (DNA). Each gene comprises a DNA segment of varying length that is in turn divided into different sections and contains concrete genetic information.
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| Genital herpes |
 A sexually transmitted disease caused by herpes viruses.
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| Genital warts |
 Warts confined primarily to the moist skin of the genitals or around the anus. They are caused by human papillomaviruses (HPVs) that are transmitted by sexual contact. Most people infected with HPV have no symptoms, but these viruses increase a woman's risk for cancer of the cervix. There is no cure for HPV infection, although anti-viral medications can reduce outbreaks and topical preparations can speed healing.
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| Genitals |
 Genitalia, genital organs. The internal and external reproductive organs in men and women.
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| Genome |
 The complete complement of genes in an organism.
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| Gestagen |
 Generic term for all endogenous and synthetic female sex hormones having an effect similar to that of progesterone.
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| GnRH analogs |
 Gonadotropin Releasing Hormone analogs. Drugs that have a similar (analogous) effect to the releasing hormone GnRH.
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| GnRH |
 Gonadotropin Releasing Hormone. A neurohormone that is produced in the hypothalamus and stimulates the pituitary gland to secrete hormones. The pituitary hormones relevant to the regulation of sexual functions are the gonadotropins. These hormones regulate the function of the gonads (ovaries and testes).
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| Gonadotropins |
 Hormones produced by the pituitary gland that regulate the function of the gonads. The gonadotropins FSH and LH regulate the function of ovaries and testes.
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| Gonads |
 Sex glands. In women the ovaries, in men the testes.
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| Gonorrhea |
 A sexually transmitted disease caused by bacteria (gonococci).
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| Gynecomastia |
 Enlargement of one or both breasts in the male. Gynecomastia is usually hormone-related and is more common in older men.
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