Types
There are two main classes of hormonal contraceptives: combined contraceptives contain both an estrogen (usually ethinyl estradiol) and a progestin. Progestogen-only contraceptives contain only progesterone or a synthetic analogue (progestin). Also marketed is ormeloxifene; while not a hormone, ormeloxifene acts on the hormonal system to prevent pregnancy.
Read more about this topic: Hormonal Contraception
Famous quotes containing the word types:
“The bourgeoisie loves so-called “positive” types and novels with happy endings since they lull one into thinking that it is fine to simultaneously acquire capital and maintain one’s innocence, to be a beast and still be happy.”
—Anton Pavlovich Chekhov (1860–1904)
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“Science is intimately integrated with the whole social structure and cultural tradition. They mutually support one other—only in certain types of society can science flourish, and conversely without a continuous and healthy development and application of science such a society cannot function properly.”
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