Abstract
The original oral contraceptives contained more oestrogen in the form of ethinyloestradiol or mestranol and progestagen in the form ofnorethynodrel or norethisterone than was necessary for conception control. There has been a trend over the years to reduce dosages of both components in order to minimize sideeffects while ensuring effectiveness. However, as dosages were lowered, there has been an increase in spotting and breakthrough bleeding during the first few months of their administration.
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© 1980 MTP Press Limited
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Greenblatt, R.B. (1980). Summary. In: Cortés-Prieto, J., Campos-da-Paz, A., Greenblatt, R.B. (eds) The Development of a New Triphasic Oral Contraceptive. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-6666-9_10
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DOI: https://doi.org/10.1007/978-94-011-6666-9_10
Publisher Name: Springer, Dordrecht
Print ISBN: 978-94-011-6668-3
Online ISBN: 978-94-011-6666-9
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