Your search found 2 Results
OUTLOOK. 1990 Jun; 8(2):7-9.This article summarizes the most recent data on WHO's multicenter clinical trial test of the low dose progestin-releasing vaginal ring as an effective contraceptive for women. The study involved 1005 women aged 19-34 and was carried out from 1980-86 at 19 centers in 13 countries, including 9 developing countries. The overall findings on vaginal ring use included: the ring's effectiveness was comparable to oral contraceptive (OC) effectiveness, pregnancy rates increased with increasing body weight, about 1/2 of the users had discontinued the ring by 1 year, the ring disrupted menstrual bleeding patterns in about 1/2 of all users, and about 1/4 of all users expelled the ring at least once but most continued to use it. The irregular bleeding pattern was the main reason for discontinuation. Part of the reason for having different ring contraceptive effectiveness in different countries could be due to differing average weights of the women. Increasing risk of expulsion was directly related to increasing age by approximately 3% with each year of age. For effective use of 90-day low-dose levonorgestrel-releasing vaginal ring, appropriate clients should have the following: a dislike for inserting and removing vaginal devices, low weight, counselling on potentially irregular bleeding, and counseling on how to deal with an expulsion. (author's modified)
Studies in Family Planning. 1984 Nov-Dec; 15(6/1):253-66.This paper critically analyzes claims for the effectiveness of the Billings method of natural family planning and raises questions about the wisdom of actively promoting this method. The Billings method, developed in Australia, is based on client interpretation of changing patterns of cervical mucus secretion. Evaluation of the method's use-effectiveness has been hindered by its supporters' insistence on distinguishing between method and user failures and by the unreliability of data on sexual activities. However, the findings in 5 large studies aimed at investigating the biological basis of the Billings method provide little support for the claims that most fertile women always experience mucus symptoms, that these symptoms precede ovulation by at least 5 days, and that a peak symptom coincides with the day of ovulation. Although many women do experience a changing pattern of mucus symptoms, these changes do not mark the fertile period with sufficient reliability to form the basis for a fully effective method of fertility control. In addition, the results of 5 major field trials indicate that the Billings method has a biological failure rate even higher than the symptothermal method. Pearl pregnancy rates ranged from 22.2-37.2/100 woman-years, and high discontinuation rates in both developed and developing countries were found. Demand for the method was low even in developing countries where calendar rhythm and withdrawal are relatively popular methods of fertility control, suggesting that women of low socioeconomic status may prefer a method that does not require demanding interaction with service providers and acknowledgment of sexual activity. The Billings method is labor-intensive, requiring repeated client contact over an extended time period and high administrative costs, even when teachers are volunteers. It is concluded that although natural family planning methods may make a useful contribution where more effective methods are unavailable or unacceptable, many of the claims made for the Billings method are unsubstantiated by scientific evidence.