NREMT Paramedic Practice

Which factors increase the risk of placenta previa?

1. High blood pressure and smoking

2. Multiple pregnancies and previous C-sections

3. Low maternal age and single pregnancies

4. First-time pregnancies only

The correct answer is: Multiple pregnancies and previous C-sections

The correct choice indicates that factors such as multiple pregnancies and previous C-sections increase the risk of placenta previa. This condition occurs when the placenta partially or wholly covers the cervix, which can lead to complications during delivery. Multiple pregnancies, such as twins or higher-order multiples, can stretch the uterus more than a singleton pregnancy, potentially leading to abnormal placental placement. Additionally, having a history of cesarean deliveries can contribute to scar tissue in the uterus, which may affect subsequent pregnancies and the location of the placenta. Overall, these factors are significant in understanding the development of placenta previa. In contrast, high blood pressure and smoking, though they are associated with various pregnancy complications, do not have a direct connection to the risk of placenta previa. Similarly, low maternal age and single pregnancies do not significantly increase the risk; in fact, advanced maternal age is often a more relevant factor. Lastly, stating that first-time pregnancies only are a contributing factor excludes other pertinent obstetric histories that may influence the risk of placenta previa.