Main Findings
In our cohort, a shorter IPI of <24 months was associated with a higher risk of anemia in late pregnancy. Shorter or longer IPIs are associated with incomplete uterine rupture. These effects became nonsignificant after controlling for possible confounders. The relationship between incomplete uterine rupture and IPI after previous CS was affected by the type of repeated CS. The incidence of GHP and GDM was significantly increased among women with an IPI of ≥120 months, and the correlation became nonsignificant after adjustment.