ABSTRACT
The increased incidence of ectopic pregnancy seen over recent decades has occurred simultaneously with an increased incidence of pelvic inflammatory disease. This suggests a causal relationship (Figure 11.1). Improvements in the treatment of pelvic inflammatory diseases may now preserve tubal function in women who previously would have suffered from tubal factor infertility. However, more recently in Norway a fall in the incidence of ectopic pregnancy has been reported.1 It has been suggested that the falling rates of pelvic inflam-
matory disease may be responsible for these changes.
