If you%26#039;re asking what the heart rate for an embryo should be, this would depend on the age of the embryo, but moreso on whether a heartbeat can even be discerned yet, %26amp; thus measured.
The embryonic heart starts beating 22 days after conception, or about five weeks after the last menstrual period, which by convention is called the fifth week of pregnancy. The embryonic heart is too small to hear even with amplification, but may be seen as a flickering in the chest area, using ultrasound as early as the fourth week. After the ninth or tenth week, the baby%26#039;s heartbeat may be heard using a Doppler instrument, though it may be a matter of luck in obtaining the optimum angle. This may become more consistent by the 12th week. After the 20th week, the heartbeat can be heard with the concave side of a stethoscope, or a special stethoscope called a fetoscope.
Between the ninth and 20th weeks, a normal fetal heart rate usually is between 120 and 160 beats per minute.
Heart rate for embryo?
faster than adult.
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