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Contraception encompasses various methods to prevent pregnancy, including hormonal options (pills, patches, injections), barrier methods (condoms, diaphragms), intrauterine devices (IUDs), and permanent sterilization procedures. These methods work through different mechanisms such as preventing ovulation, blocking sperm transport, or creating an unsuitable environment for implantation.
Hormonal contraceptives primarily work by suppressing the hypothalamic-pituitary-ovarian axis, preventing ovulation through inhibition of luteinizing hormone (LH) and follicle-stimulating hormone (FSH) surge. Barrier methods physically prevent sperm from reaching the egg, while copper IUDs create a toxic environment for sperm and may prevent implantation through inflammatory responses in the endometrium.
Selection of contraceptive methods requires consideration of patient factors including age, medical history, lifestyle, and personal preferences, as effectiveness rates vary significantly between methods. Healthcare providers must assess contraindications such as thrombotic risk for hormonal methods, and counsel patients on proper use, potential side effects, and the importance of consistent application for optimal efficacy.