Fetal pulse
The pulse of the fetus is the voice that gives hope to life, and reassures the mother on her fetus and confirms that he is healthy, and despite the mother believes that the sound of the pulse is similar every time you visit the doctor, but there are radical changes occur on the composition of the heart of the fetus and the circulatory system in his body, Pulse of the embryo of important vital indicators that should be monitored at each visit to the doctor to check on the development of the fetus and development, and the absence of any defect that calls for concern.
Heart and circulatory system of the fetus
Although there is no pulse for the fetus in the first weeks of pregnancy, there are distinctive blood vessels beginning with the fourth week of pregnancy. These special vessels develop rapidly to form the heart and circulatory system of the fetus. At the beginning of the formation, the heart takes the shape of the tube, With the beginning of the fifth week, the pulse can not be heard at this stage, despite its existence, after which the heart valve is divided and formed to be the heart and valves in its natural form. With the sixth week of pregnancy, the pulse of the fetus becomes 80 beats per minute, and the heart becomes four chambers, And an outlet that allows the passage of Blood and body out.
Time of fetal pulse onset
As mentioned above, the fetal pulse reaches 80 beats per minute with the sixth week of pregnancy. Two weeks later, the pulse multiplies to 150 beats per minute. This rate is twice the normal pulse rate in adult humans. Pulse between the sixth week and the tenth of pregnancy, where the pulse rate is 170 beats per minute, and this rate begins to decrease thereafter.
Sound of fetal pulse
Many mothers are similar to the sound of the fetus’s pulse during the race. When it is first heard, the pulse is very fast. If the fetus is healthy, the pulse will range between 120-160 beats per minute. If it is much lower or higher than this, On the presence of heart problems in the fetus.
Devices used to hear fetal pulse
To hear the pulse of the fetus, the doctor should use one of the devices that reveal the sound issued by the fetus, including the Doppler Doppler, which can be carried by hand, and placed by the doctor on the mother’s pregnant mother to issue sound waves reveal the sounds of fetal movement and pulse and multiply, Or to strengthen these sounds so that the doctor and mother to hear them, on the other hand uses the device Transvaginal Ultrasound (Transvaginal Ultrasound) also very same, and features the ability to detect the pulse in the early stages of pregnancy, the device contains a probe inserted through the vagina and in turn reveals Sounds from the jinn N and pulse, as the doctor can see the uterus and measure the pulse rate of the fetus.
Use a stethoscope to hear the fetal pulse
It is possible to use a stethoscope to hear the sound of the pulse at the fetus at the beginning of the twentieth week of pregnancy, and the ability to hear the doctor to pulse pulse of the fetus through the earphone from one to the other, and other factors may hinder the pulse, including the presence of noise at the examination site, The weight of the pregnant mother, the thickness of the abdominal wall, and the skill and expertise of the doctor.
Do not hear the pulse of the fetus
In some cases, the Doppler can not detect the pulse of the fetus. This may not be a concern in most cases. The cause may be due to the fetus taking a back position or sitting in the corner of the uterus. If the examination is repeated within days or the following visit, the sound will be heard more clearly .
But if the sixth week of pregnancy is not heard without hearing the fetal pulse on the ultrasound, there may be a possibility of an ectopic pregnancy or an abortion in the near future. The doctor should discuss it with the mother. The doctor may request a pregnancy hormone test Or repeat the ultrasound after four or five days; to make sure that the reason for not hearing the pulse was not because of a defect in the device, and the doctor evaluates several things other than the pulse of the fetus, such as the size of the fetus and the bag of pregnancy, these things help determine the age of the fetus, The pulse must be heard or must wait.
The relationship between the fetal pulse and the probability of miscarriage
Several studies have shown that the probability of miscarriage increases if the fetus pulse is less than 100 beats per minute when the gestational age is three to four weeks, or less than 120 beats per minute when gestational age is between 6.3 and 7 weeks. On the other hand, if the fetal pulse is heard between the sixth and eleventh weeks of pregnancy, the probability of miscarriage is only 1%.
Irregular heartbeat of the fetus
In fact, it is normal to observe changes in the fetal pulse and instability. The pulse rate increases or decreases according to the movement and activity of the fetus, just as happens in humans, whose pulse rate increases when jogging or physical activity, and decreases with sleep or rest, Pulses from time to time do not cause anxiety as long as within normal fetal range, which is 120-160 beats per minute.
On the other hand, the doctor may notice irregular rhythms or harmony in the heartbeat of the fetus, and this does not cause concern, as the fetus is still in the process of growth and heart is not yet completed, and this may be the reason, but it is safe to take the doctor additional tests from Door more reassurance.