Which of the following is a risk factor for placenta previa?

Placenta previa is a condition in which the placenta partially or completely covers the cervix, potentially leading to complications during pregnancy and delivery. Understanding the risk factors associated with placenta previa is crucial for proper management and care.

Chronic hypertension is recognized as a risk factor for placenta previa because it can affect the vascular structure and development of the placenta. Women with chronic hypertension may experience increased incidences of placental abnormalities, which can lead to the development of previa. Additionally, hypertension may also impact overall placental implantation and position, making it more likely for the placenta to attach to the lower uterine segment.

In contrast, young maternal age, a single gestation, and having no prior pregnancies are generally not recognized as significant risk factors for placenta previa. Young maternal age has been associated with certain pregnancy complications, but it does not directly influence the likelihood of developing placenta previa. Similarly, single gestations are less likely to be associated with placental abnormalities compared to multiple gestations. Lastly, having no prior pregnancies might suggest a lower risk, as previous experiences may sometimes contribute to complications related to placentation or cervical health.

Thus, chronic hypertension stands out as a significant contributor to the likelihood of placenta previa due to its impact on placental health and location.