What affects placental health?

Various factors can affect the health of the placenta during pregnancy, with some under your control and some not. For example:

• Maternal age. Some placental problems are more common in older women, especially after age 40.
• A break in your water before labor. During pregnancy, your baby is surrounded and cushioned by a fluid-filled membrane called the amniotic sac. If the sac leaks or breaks before labor begins, also called your water breaking, the risk of certain placental problems increases.
• High blood pressure. High blood pressure can affect your placenta.
• Twin or other multiple pregnancy. If you're pregnant with more than one baby, you might be at increased risk of certain placental problems.
• Blood-clotting disorders. Any condition that either impairs your blood's ability to clot or increases its likelihood of clotting increases the risk of certain placental problems.
• Previous uterine surgery. If you've had a previous surgery on your uterus, such as a C-section or surgery to remove fibroids, you're at increased risk of certain placental problems.
• Previous placental problems. If you've had a placental problem during a previous pregnancy, you might have a higher risk of experiencing it again.
• Substance use. Certain placental problems are more common in women who smoke or use cocaine during pregnancy.
• Abdominal trauma. Trauma to your abdomen — such as from a fall, auto accident or other type of blow — increases the risk of the placenta prematurely separating from the uterus (placenta abruption).