Novel contraceptive ring: contraceptive treatment of double effect

Legend, Arab businessmen placed in the uterus of the mother camels smooth stones to avoid pregnancy, to keep the ship of the desert of the workforce. Perhaps this is intrauterine embryonic form. Commonly known as intrauterine contraceptive ring, is a place of contraceptives in the uterine cavity. From 40 years ago, intrauterine devices because of their low contraceptive effectiveness, side effects and are widely used. At present, is still the most used among China\'s long-acting contraceptive methods.

30 years ago, foreign scientists embarked upon the preparation of slow release drugs of intrauterine, to achieve contraception, treatment of double effect. In 1990, a constant, slow release progesterone novel contraceptive ring in Finland listed. In 2000, United States food and Drug Administration approval. At present, 600duowanming women more than it already has more than 100 countries are currently in use. Have experience of more than 8,000 cases in China.

This new loop is actually a \"t\" type. Each loop contains norethisterone left 52mg, left acetylene release 20 micrograms of levonorgestrel per day. Its contraception of effect from following three a aspects: first, uterine within film was high concentration pregnant hormone of effect, very does not suitable fertilized eggs this health root germination; this efficient pregnant hormone also makes cervical, and tubal of liquid became viscosity heavy, seemed in sperm of way set has numerous obstacles; part women ovarian also because these strong pregnant hormone of role and is sleep, and does not ovulation of State. This new type of contraceptive ring lifespan is 5 years. There are many scientific literature confirmed that contraceptive ring out, ovarian and endometrial soon returns to normal, women even though the band had during menopause, can also be resumed menstruation.

In this new type of contraceptive ring containing progesterone inhibits proliferation of the endometrium, so both treatment and the role of Dysmenorrhea. Few patients with amenorrhea may occur after. Doctor recommendations, reproductive females, if willing to take long-acting contraceptive method, particularly at the same time with menorrhagia and dysmenorrhea, or had the use of copper-IUD during menstrual period long, by volume, and select this new loop is more appropriate. Loop-in menstrual instance within 7 days, or immediately after induced abortion, or placed after 6 weeks of delivery. Doctor special reminded, known or suspected pregnancy, and are-patient pelvic inflammatory or pelvic inflammatory recurrence, and Xia reproductive road infection, and postpartum uterine within film inflammatory, and past three months within has infection sexual abortion, and serious cervical inflammatory need treatment, and cervical non-typical hyperplasia, and uterine or cervical malignant disease, and uterine form exception, and acute liver disease or liver tumor, patients, are does not suitable used this new contraception ring.