Oral contraceptive formulations - Wikipedia, the free encyclopedia. Oral contraceptives come in a variety of formulations.
The main division is between combined oral contraceptive pills, containing both synthetic estrogens and progestogens (progestins), and progestogen only pills (mini- pills). Combined oral contraceptive pills also come in varying types, including varying doses of estrogen, and whether the dose of estrogen or progestogen changes from week to week. Mechanism of action.
They also thicken the cervical mucus, which keeps sperm from joining with an egg. The hormones in combination and progestogen- only pills also thin the lining of the uterus. This could prevent pregnancy by interfering with implantation of a blastocyst. Main action in typical use is prevention of ovulation.
Combined oral contraceptive pills. They are usually taken for 2. These differ in the amount of estrogen given, and whether they are monophasic (the same dose of estrogen and progestogen during each of the 2. The introduction of extended- cycle monophasic pills (i. Seasonale) has shown that the withdrawal bleeding intervals can be decreased. Monophasic. Everyday regimens (Microgynon 3.
ED, Femodene ED, Logynon ED), which include seven inactive placebo pills, are rarely used in UK practice. People who use them may experience irregular light bleeds, and whilst irregular in the first few months of taking, usually settles to a regular pattern in time.
The following progestogens are used: 3. DHF, 8- prenylnaringenin, apigenin, baicalein, baicalin, calycosin, catechin, daidzein, daidzin, ECG, EGCG, epicatechin, equol, formononetin, glabrene, glabridin, genistein, genistin, glycitein, kaempferol, liquiritigenin, mirificin, myricetin, naringenin, pinocembrin, prunetin, puerarin, quercetin, tectoridin, tectorigenin)Fosfestrol (diethylstilbestrol diphosphate)Furostilbestrol (diethylstilbestrol difuroate)Hexestrol. Hydroxyestrone diacetate. ICI- 8. 59. 66. Lavender oil.
Lignans (e. g., enterodiol, enterolactone)Mestilbol. Metalloestrogens (e. Methallenestril. Methestrol. Methestrol dipropionate.
Methiocarb. Methoxychlor. Miroestrol. Paroxypropione. Pentafluranol. Phenestrol. Photoanethole. Prinaberel (ERB- 0.
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