Norethisterone is safe for most women to use on an occasional basis, but it is not recommended to use this to delay your period regularly. There are also some side effects associated with taking the medication. "Women may experience side effects such as low mood, acne, breast tenderness, fluid retention and loss of libido," says Miss Meg Wilson In newer versions of the pill, estrogen levels are between 20 and 50 micrograms, and progesterone levels are between .01 and 3.0 milligrams. Those early birth control pills gave women more control Progestin-only oral contraceptives are indicated for the prevention of pregnancy. Efficacy. If used perfectly, the first-year failure rate for progestin-only oral contraceptives is 0.5%. However, the typical failure rate is estimated to be closer to 5%, due to late or omitted pills. The POP is very popular for several reasons: It has a high efficacy of 94 percent, though this is lower than that of the combined oral contraceptive pill. It contains less progestogen than the Terminology. Progestogen-only pills", "Progestin-only pills", and "Progesterone-only pills" are terms each referring to the same class of synthetic hormone medications.The phrase "Progestogen-only pill" is used by the World Health Organization and much of the international medical community. The phrase "Progestin-only pills" is typically used in the United States and Canada. The minipill, or progestin-only pill, takes the top spot as the most popular birth control option for people with heavy periods. (PMS) and premenstrual dysphoric disorder (PMDD). WorrQ.

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