The journal of obstetrics and gynaecology research
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J. Obstet. Gynaecol. Res. · Oct 2000
Reference intervals for first trimester embryonic/fetal heart rate in a Thai population.
To establish reference intervals for first trimester embryonic/fetal heart rate in a Thai population. ⋯ Reference intervals for first trimester embryonic/fetal heart rate in a Thai population were established. Our reference intervals may be useful for further studies, such as the prediction of spontaneous abortion or chromosomal disorders after ultrasound-proven viability in the first trimester.