Fetal activity is thought to be critical for normal development of the limbs.

Fetal Activity

Movements or actions performed by a fetus within the womb, which can include kicking, turning, and other motions.

Limbs

The appendages of the body, such as arms and legs, that extend from the central part of the organism.

Normal Development

The typical progression through different stages of physical, cognitive, emotional, and social growth expected at certain ages.