The differences between these phases are the number of different colored pills formulated with different strengths. Other dosing schedules include biphasic (two-phase), triphasic (three-phase), and even quadriphasic (four-phase). A monophasic dosing cycle with 28 days will include seven inactive or placebo pills that are another color. In other words, tablets of one strength are taken for 21 days. Most products on the market use a one-phase dosing cycle, or monophasic. They also work to thin the lining of the uterine wall so that if an egg is fertilized, it is more difficult to implant.ĬOCs are most effective when the pills are taken correctly according to the instructions. When used in birth control pills, progestin and estrogen thicken the mucus inside the cervix, making it harder for sperm to travel to the egg. Combination birth control pills or progestin-only pills?Ĭombination birth control pills contain both estrogen and progestin. If you’re experiencing any adverse side effects when taking oral contraceptives, make sure to talk to your doctor. Some side effects of taking estrogen products include nausea, cramps, headaches, weight gain, and abnormal uterine bleeding. It is also found in products that treat symptoms during menopause, such as hot flashes, vaginal dryness, and itching. During pregnancy, it supports functions that secrete breast milk.Įstrogen is commonly found in birth control products, such as oral contraceptives and vaginal rings. For example, during puberty, estrogen contributes to the development of mammary ducts. Like progesterone, estrogen is a sex hormone naturally produced in the body and is responsible for developing female sexual characteristics. Other studies analyzing other side effects, such as the impact on sex drive and development of mood disturbances, are limited in terms of evidence and may offer conflicting views. Some common uses for progestin in products outside of contraception include treating abnormal uterine bleeding, severe premenstrual syndrome (PMS), and postmenopausal hormone replacement therapy.ĭo progestin products have any adverse side effects? When taking oral contraceptives that contain progestin, some women may experience side effects including ovarian cysts, breast tenderness, headaches, fatigue, nausea, and hair thinning. It contributes to maternal breast tissue growth while also preventing lactation, and prepares the body for labor by strengthening the wall muscles around the pelvic area. Progesterone also plays an important role during pregnancy. As a naturally occurring hormone, progesterone is released from the ovaries to prepare the body for pregnancy. Progestin is a synthetic form of progesterone, which is a female hormone found in a woman’s body. In this article, we will look at the major differences between progestin and estrogen as it relates to birth control, and why the pill is not “one size fits all.” What you need to know about progestin Outside of their use in contraceptives, estrogen and progesterone are naturally produced in the female body and play key roles in regulating certain body functions in women throughout puberty, pregnancy, and menopause.Īs two common hormones found in oral contraceptives, understanding the differences between combination pills and progestin-only pills can help you select one that fits your needs and lifestyle. These refer to two female sex hormones that are used in birth control products. When considering which oral contraceptive is right for you, two medical terms you might come across are progestin (a synthetic form of progesterone) and estrogen.
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