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Archived from the original on Retrieved Aug 21, Jaypee Brothers Medical Pub. Research 75mg reproductive health at WHO: Archived PDF from the original on 13 December Retrieved 8 December International Drug Price Indicator Guide.
Retrieved 21 August In Hatcher, Robert A, levonorgestrel 0 75mg. Contraceptive technology levonorgestrel revised ed. Mechanism of action Copper-releasing IUCs When used as a regular or emergency method of contraception, copper-releasing IUCs act primarily to prevent fertilization.
Emergency contraceptive pills To make an informed choice, women 75mg know that ECPs—like the birth control pill, patch, ring, levonorgestrel 0 75mg, shot, and implant,76 and even like breastfeeding77—prevent pregnancy primarily by delaying or inhibiting ovulation and inhibiting fertilization, levonorgestrel 0 75mg, but may at times inhibit implantation of a fertilized egg in the endometrium.
However, women should also be informed that the best available evidence indicates that ECPs prevent pregnancy by mechanisms that do not involve interference with post-fertilization events.
ECPs levonorgestrel not cause abortion78 or harm an established pregnancy.
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One study has demonstrated that 75mg can delay ovulation. Another study found that UPA altered the endometrium, but whether this change would inhibit implantation is unknown. Progestin-only emergency contraceptive pills. Early treatment with ECPs containing only the progestin levonorgestrel has been 75mg to impair the ovulatory process levonorgestrel luteal function.
Combined emergency contraceptive pills. Several clinical studies have shown that combined ECPs containing ethinyl estradiol and levonorgestrel can inhibit or delay ovulation.
Royal College of Obstetricians and Levonorgestrel. Archived PDF from the original on How does EC work? Inlevonorgestrel 0 75mg, a judicial review ruled that pregnancy begins at implantation, not fertilisation.
Copper-bearing intrauterine device Cu-IUD.
DESCRIPTION
Copper is toxic to the ovum and sperm and thus the copper-bearing intrauterine device Cu-IUD is effective immediately after insertion and works primarily by inhibiting fertilisation. The precise mode of action of levonorgestrel LNG is incompletely understood levonorgestrel it is thought to work primarily by inhibition of ovulation, levonorgestrel 0 75mg.
Archived PDF from the original on March 16, The primary mechanism of action is to 75mg or disrupt ovulation; LNG ECP use may also prevent the sperm and egg from meeting. A clinical guide for contraception 5th ed.
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