What factor increases the risk for endometritis following delivery?

The factor that increases the risk for endometritis following delivery is manual removal of the placenta. This is because manual removal can cause trauma to the uterine lining, introduce bacteria into the uterine cavity, and disrupt the normal healing process that occurs after childbirth. When the placenta is not expelled normally, the intervention may lead to retained products of conception, which can foster an environment conducive to bacterial growth and inflammation, thereby heightening the risk of endometritis.

In contrast, prenatal vitamins and a healthy maternal diet are associated with improved maternal health and outcomes, likely contributing to a lower risk of complications such as endometritis. Low maternal age does not have a direct link with increased risk for endometritis; rather, risk factors are more commonly associated with obstetric interventions and maternal health considerations during and after delivery.