Population
52 women at 10-20 weeks of normal gestation (fetuses)
Design
Cross-sectional
Authors
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Requires gestational age-specific fetal cardiac reference ranges now; leaves open links to later outcomes.
Fetal cardiac function undergoes significant gestational age-related changes during the late first and early second trimesters, including increased flow velocities and filling times.
Splunder et al. (1996) studied this question.
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