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Graph shows the median frequency of movements in fetuses grouped by age (± interquartile range). There is a significant decrease in the rate of leg movements between fetuses younger than GA 25 weeks and those older than GA 31 weeks (P = .015). There are no statistically significant differences in the median rates of head, arm, or trunk movements between age groups (P = .746, P = .310, and P = .397, respectively).
