Since 1981, when eye movements of the human fetus were first reported
the study of fetal eye movements has increased, mainly focusing on the
ontogenesis of eye movements and as one parameter of behavioral state
s. Using real-time ultrasound fetal eye movements can be clearly obser
ved from 14 weeks of gestational age. Fetal eye movements may be descr
ibed in terms of their pattern, frequency and incidence of periods con
taining eye movements and no eye movements. Furthermore, the relations
hip of eye movements to other behaviors may be used to give informatio
n on the integration of central nervous system function. A picture of
normal fetal eye movements can be constructed and used to detect abnor
malities in eye movements which can indicate underlying abnormalities
of the central nervous system. This paper concludes that, although in
its early stages, the study of fetal eye movements holds promise for a
greater understanding of brain development and the assessment of the
condition of the fetus.