Peroralna kontracepcija: razlika med redakcijama

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==Mehanizem delovanja==
Tabletke delujejo na več načinov. Preprečujejo [[ovulacija|ovulacijo]], povzročijo tudi, da je verjetnost da se embrio vgnezdi v [[maternico|maternica|maternico]] manjša. Pride tudi do spremembe cervikalne sluzi, tako da spermiji težje dosežejo jajčece.
 
Several different types of 'the Pill' exist. Generally, they all have revolved around different synthetic estrogens and progestins, chemical analogues of the natural [[hormone]]s [[estradiol]] (an [[estrogen]]) and [[progesterone]] (a [[progestagen]]). Most common brands use 20 to 40 micrograms of [[ethinyl estradiol]] as the estrogen component and either a fixed or varying (the bi- and triphasic pills) amount of either [[levonorgestrel]] or [[norethindrone]] as the progestagen component.
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