Hormone-releasing vaginal contraceptive ring.Introductory trials of a vaginal ring vaginal ring Gynecology An annular contraceptive device inserted in the vagina before coitus, which slowly releases levonorgestrel or progesterone. See Norplant, Pearl index. Cf Female condom. which releases levonorgestrol at a low rate of 20 micrograms per day will be available in introductory trials later this year. The ring, developed by the World Health Organization (WHO) can be left in place for as long as three months, an advantage over rings releasing both an estrogen and a progestogen progestogen /pro·ges·to·gen/ (-jes´tah-jen) progestational agent. pro·ges·to·gen n. Any of various substances having progestational effects; a progestin. , which have to be removed once a month for withdrawal bleeding. The ring is available like condoms or diaphragms and can be inserted and removed by the woman herself. Further advantages include that the whole amount of the hormone reaches the target organs target organ n. A tissue or organ that is affected by a specific hormone. target organ, n the organ or body part whose activity levels demonstrate change in the course of biofeedback. , rather than being metabolized in the liver like the pill. India and China have expressed interest in having trials start in 1991-92. --From Entre Nous, No. 16, 1990, published by the European Family Planning family planning Use of measures designed to regulate the number and spacing of children within a family, largely to curb population growth and ensure each family’s access to limited resources. Magazine WHO regional office, Copenhagen, Denmark. Reported in WGNRR, No. 34, Jan-March 1991. |
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