Standard Days Method Advanced Slides 1

Efficacy Study of SDM Multi-site prospective study Services provided in existing programs Clients were followed monthly for 13 cycles Couples used the method correctly in 97% of cycles 478 women in the study, 43 got pregnant With correct use, the failure rate is 4.8 With typical use the failure rate is

The Standard Days Method is based on Viable sperm – up to 5 days Viable egg – up to 24 hours The probability of pregnancy relative to ovulation. 3

Probability of Pregnancy from Intercourse on Days Relative to Ovulation Pregnancy Rate Ovulation Source: Wilcox et al

The Standard Days Method is based on Menstrual Cycle mid-point ± 3 days Viable sperm – up to 5 days Viable egg – up to 24 hours The probability of pregnancy relative to ovulation. Timing of ovulation. 5

Probability of Ovulation Relative to Midpoint of Cycle 37% 16% 14% 12% 5% 7% 1% [Source: IRH Analysis of WHO 1981 data] 6

The Standard Days Method is based on Menstrual Cycle mid-point ± 3 days Viable sperm – up to 5 days Viable egg – up to 24 hours The probability of pregnancy relative to ovulation. Timing of ovulation. 7

Day 8Day 19 Determining the Fertile Window 8