This depends on patient compliance and age. The quoted results vary from 0.3 to 4 per hundred women years (Q13.6). The progestogen-only pill is very effective during breast-feeding. Failure rates may be higher if you are overweight; if you are heavier than 11 stones (70KG) it is advisable to take two pills daily.


women's health



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Women's Health

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This is the personal website of David A Viniker MD FRCOG, Consultant Obstetrician and Gynaecologist at Whipps Cross University Hospital, London - Specialist Interests - Reproductive Medicine including Infertility, PCOS, PMS, Menopause and HRT.

I do hope that you find the answers to your women's health questions in the patient information and medical advice provided.





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