<unk>  refers to motion of a fetus caused by its own muscle activity. Locomotor activity begins during the late embryological stage, and changes in nature throughout development. Muscles begin to move as soon as they are innervated. These first<unk> s are not reflexive, but arise from self-generated nerve impulses originating in the spinal cord. As the nervous system matures, muscles can move in response to stimuli.
Although the heart begins to beat on the 23rd day after conception, this article primarily deals with voluntary and reflex<unk> s. Ages are given as age from fertilization rather than as gestational age.
Fetal movement
Fetal distress
Osborn wave
Umbilical region pain
Crown-rump length
Cervical dilation
Breech birth
Respiratory patterns