At approximately day 1

Focused alertness.

Duration: 4 weeks

Reference

DiPietro JA. 2001. Fetal neurobehavioral assessment. In: Singer LT, Zeskind PS, eds. Biobehavioral assessment of the infant. New York: The Guilford Press. p 43-80. Citing Als, H. 1982. Toward a synactive theory of development: Promise for the assessment and support of infant individuality. Infant Mental Health J 3:229-243.