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  • Title: Reasons for contraceptive discontinuation in women 20-39 years old in New Zealand.
    Author: Colli E, Tong D, Penhallegon R, Parazzini F.
    Journal: Contraception; 1999 Apr; 59(4):227-31. PubMed ID: 10457866.
    Abstract:
    To estimate the frequency and the medical and nonmedical reasons for discontinuation of oral contraceptive (OC), intrauterine device (IUD), and injectable depot medroxyprogesterone acetate (DMPA) use, data from a cohort of experienced contraceptive users in New Zealand are reported. The current analysis consists of 2469 OC, 2072 IUD, and 1721 DMPA users followed over a period of 5 years. The percentage of women who discontinued the use of the method within 24 months after entry into the cohort were 42%, 44%, and 48%, respectively, for OC, IUD, and DMPA; these differences were not statistically significant. The most common reasons given for discontinuing a contraceptive method, regardless of which method was in use, were the desire to conceive, patient preference, no longer needing contraception, and vasectomy. Among the medical reasons, menorrhagia and intermenstrual bleeding were the reasons for discontinuing use of the method in 1.5 and 1.1 times per 100 women-years among DMPA users and in 1.8 and 4.7 times per 100 women-years among OC users. Pelvic pain and infection were reasons for discontinuing contraceptive method, respectively, 4.4 and 4.3 times per 100 women-years among IUD users. In conclusion, the present study confirms, in this New Zealand population, the high discontinuation rate of contraceptive methods reported elsewhere. In contrast with previous suggestions, in this study, irregular bleeding was not an important medical reason for discontinuation of DMPA use. This article reports the results of a large cohort study conducted in New Zealand. The study was originally designed to evaluate the risk of cervical dysplasia, carcinoma in situ, and invasive cervical cancer among users of oral contraceptives (OC), intrauterine devices (IUD), and injectable depot medroxyprogesterone acetate (DMPA). A cohort of 7199 women was followed at approximately annual intervals over a period of 5 years. Results showed that the most common reasons given for discontinuing a contraceptive method regardless of which method was in use were the desire to conceive, personal preference, the cessation of need, and vasectomy in the user¿s sexual partner. In conclusion, this study confirms the high discontinuation rate of contraceptive methods reported elsewhere.
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