At 13 weeks of pregnancy, your baby is still quite small and their movements may not be noticeable yet. However, they are already starting to move and wiggle around in the womb. As your pregnancy progresses, you will begin to feel these movements more clearly. Most women start feeling their baby's first movements, also known as "quickening," between 18 and 25 weeks of pregnancy. It is important to note that every pregnancy is different, so some women may feel their baby move earlier or later than others. If you have any concerns about fetal movement or if you haven't felt any movement by the time you reach 25 weeks, it is recommended to consult with your healthcare provider for further evaluation.