1. Oral tablets They contain a combination of estrogens and progestins. Their regular intake prevents the maturation of eggs in the ovaries and causes changes in the lining of the uterus and the mucus that covers it. This prevents sperm from reaching the egg. Some women prefer the so-called extended cycle tablets. Pills that contain hormones are taken for 12 weeks, then pills without hormones are taken for 1 week. When taking such a product, menstrual bleeding occurs only 3-4 times a year. There are many different hormone products, each with their own advantages and disadvantages. The choice should be made after careful discussion with the attending gynecologist. Contraindications for taking these products are smoking after the age of 35, previous thrombotic incidents, breast, endometrial or liver cancer. Some antibiotics can compromise the effectiveness of oral contraceptives. Their reception is an occasion for resorting to a second contraceptive method while the antibiotic treatment lasts and for some time afterwards. It is recommended that six months pass after stopping their intake for pregnancy planning. After giving birth, at least one month must pass before their intake can be started. Otherwise, the risk of thrombosis and acute vascular accident is too high. 2. Transdermal patches Placed on the skin of the abdomen, buttocks, back or arms. They work in the same way as tablets, but the hormones enter the bloodstream through the skin, not through the mouth. Patches are changed weekly for three weeks, then not worn for one week to allow for menstrual bleeding. The cycle is then repeated again. The same interactions and contraindications apply to them as for oral products. 3. Depot injections They are pharmaceutical forms for injection into the buttock or armpit, from where they release progestins for three months, after which the injection must be repeated. They should not be used for more than two years without a break, as they lead to a decrease in bone density. Although bone density increases to normal levels after stopping their use, long-term use can lead to osteoporosis. NEWS_MORE_BOX 4. Vaginal rings These are thin, flexible devices that release progestins and estrogens. They are inserted into the vagina at home and worn for three weeks, after which they are removed. A new ring is placed on the new cycle. The same warnings and contraindications apply to them as to oral tablets and transdermal patches.