Reports

Fetal Movement: Development and Time Course

Science  03 Jul 1970:
Vol. 169, Issue 3940, pp. 95-97
DOI: 10.1126/science.169.3940.95

Abstract

Prenatal behavior develops in three phases: early rates, acceleration and maintenance, and deceleration to birth. Fetal activity occurs as discrete movements, bursts of activity, and prolonged activity. Four-hour samples were most representative of the daily rates of movement.

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