Abstract

Abstract A comparison of the utilization and effectiveness of the pill between comparable groups of women on sequential and combined doses was based on data gathered for 2,000 women from the Buffalo Planned Parenthood Center. The type of pill prescribed for women in this study was randomly selected. Synthetic cohort life tables, following procedures developed by Tietze, were compiled for women using each type of pill. The finding indicate that combined oral contraceptives are superior to sequentials. Not only was the rate of accidental pregnancy less than half as great for combined users, but the continuation rate was 14 percent higher for women on combined pills. In addition, significantly fewer women on combined pills terminated for medical reasons. These findings, combined with data from Sartwell, et al. , which indicated that women on sequential pills are at higher risk to thromboembolism, provide persuasive evidence to limit the use of sequential contraceptives.

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