If you have an anterior placenta and are not feeling any baby movements at 20 weeks, it is important to remember that every pregnancy is different, and some women with anterior placentas may feel fewer or less pronounced movements. However, if you are concerned, it is always best to consult your healthcare provider for reassurance and guidance. They may recommend additional monitoring such as ultrasound scans or fetal kick counts to ensure the well-being of your baby. It is also worth noting that as your pregnancy progresses, the position of the placenta may change, allowing for more noticeable movements.