What is one of the risk factors associated with placental abruption?

Smoking tobacco is indeed recognized as one of the significant risk factors associated with placental abruption. The harmful substances in tobacco smoke can lead to various complications during pregnancy, including vascular constriction and reduced blood flow to the placenta. This can increase the likelihood of the placenta separating from the uterine wall prematurely, resulting in placental abruption. The impact of smoking on placental health and overall pregnancy outcomes highlights the importance of addressing tobacco use in expectant mothers to reduce the risk of complications such as abruption.

In contrast, while a history of previous vaginal birth, being under age 25, or engaging in excessive exercise might be relevant to other aspects of pregnancy, they are not specifically linked to an increased risk of placental abruption in the same direct manner as smoking is.