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Updated: Jun 23, 2026
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In utero Measurement of Heart Rate in Mouse by Noninvasive M-mode Echocardiography
Published on: November 22, 2013
Embryonic heart rate as a prognostic factor for chromosomal abnormalities
Deniz Oztekin1, Ozgur Oztekin, Fatma I Aydal
1Department of Obstetrics and Gynecology, Aegean Obstetrics and Gynecology Training and Research Hospital, Izmir, Turkey. dcoztekin@gmail.com
Summary
A slow embryonic heart rate before 7 weeks of gestation may indicate a higher risk of chromosomal abnormalities. This finding suggests embryonic heart rate can be an early screening marker for genetic conditions.
Area of Science:
- Prenatal diagnostics
- Embryology
- Genetics
Background:
- Early pregnancy monitoring is crucial for identifying potential developmental issues.
- Chromosomal abnormalities can significantly impact pregnancy outcomes.
Purpose of the Study:
- To assess the predictive value of a slow embryonic heart rate for chromosomal abnormalities.
- To determine if embryonic heart rate serves as an early screening marker.
Main Methods:
- Compared heart rates of 57 embryos with slow rates to 1156 with normal rates before 7 weeks' gestation.
- Utilized screening blood tests and invasive karyotype analysis for risk assessment.
Main Results:
- Pregnancies with slow embryonic heart rates had a 15.8% first-trimester death rate versus 2.5% in the normal group.
- A higher percentage of trisomy 21 was observed in the slow heart rate group compared to the normal heart rate group (P < .05).
Conclusions:
- A slow embryonic heart rate before 7 weeks' gestation is associated with an increased likelihood of chromosomal abnormalities.
- Embryonic heart rate may serve as a valuable early screening tool for genetic conditions.
