Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
3915412 | Contraception | 2007 | 5 Pages |
Abstract
We found generally good concordance between the starts of menstrual periods as determined by an algorithm adapted from the WHO and the date of the start of a period as reported by participants on diary cards. In our earlier study, we found that the earlier in the cycle a woman took 1.5 mg levonorgestrel, the earlier was the next period. Had we relied on women's recording of the first period on the diary card, we would not have reached that conclusion.
Related Topics
Health Sciences
Medicine and Dentistry
Obstetrics, Gynecology and Women's Health
Authors
James Trussell,