The best way to find out why your doctor
(presumably your OB/GYN) is sending you to a perinatal specialist is to ask him or her! In general, perinatal specialists (also known as maternal-fetal medicine specialists) do take care of women with higher-risk pregnancies. However, there can be a broad range of reasons why a general OB/GYN may refer a woman to a specialist. This can include a woman's age or medical comorbidities; the type of pregnancy (ie twins or multiple gestations); a previous history of difficult pregnancies (unexplained fetal loss, for example); or sometimes events which occur during a pregnancy (suggestion of possible abnormal fetal development). Your doctor may simple want a specialist to meet you and review your history because of a single detail, or he or she may have a specific reason for thinking that you might need to follow with a specialist throughout the rest of your pregnancy to try and ensure the best possible outcome for your and your baby.
You can definitely discuss this with your regular OB/GYN or the perinatologist when you meet him or her. Hopefully they can put your mind at ease and answer any additional questions you might have about your pregnancy.