An active baby in the womb is generally a sign of a healthy pregnancy and should not be a cause for concern. It is normal for babies to move around in the womb, and this movement is important for promoting healthy bone and joint development. There is no such thing as too active a baby in utero, and as the pregnancy progresses, the baby will tend to grow and become even more active. Some factors that can affect the level of fetal movement include the weight of the mother, the position of the placenta, and the personality of the baby. However, there is no scientific explanation for why some babies are more active than others.

It is important to note that an increase in fetal movement during the third trimester may indicate the compromise of the fetus that is related to the disturbance of the environment in the uterus. However, this is not the case for normal fetal movement during pregnancy.

In summary, an active baby in the womb is a good thing and usually means that the baby is developing in utero exactly as they should.