All women need regular check-ups with their OB-GYN, starting at age 13 to 15, says Dr. Shannon Clark, an associate professor in the Division of Maternal-Fetal Medicine at UTMB. Frequency varies until age 21, when appointments — which cater to preventive health services — should become annual. “It’s very important that all women establish care with an OB-GYN and be routinely seen,” Clark says. The article also appears on Yahoo! News and World News Network.