Estimated Date at which Events would Occur from 2 Acts of Unprotected Intercourse Per Week

1
Estimated Date at which Events would Occur from
2 Acts of Unprotected Intercourse Per Week

Chlamydia
Pregnancy
HIV (if cofactors)
Syphilis Gonorrhea
Jan.
April
July
Oct.
Dec.
Slide from Ward Cates
2
Risk of Events Per Single Act of Unprotected
Intercourse
Gonorrhea, Syphilis
50
40
Risk Per Coital Act
30
Peri ovulatory
Chlamydia
20
4-5 days pre ovulation
10
HIV (if co factors)
During menses
0
Infection
Pregnancy
Sources Anderson (1999) Wilcox (1995) Slide
from Ward Cates