1. How long can I hear my fetal heart rate when I am pregnant?
Generally after 40 days of pregnancy, the gestational sac can be seen by B-ultrasound examination, and the fetal cardiovascular pulsation can be monitored about 50 days. In the 11th week of pregnancy, you can hear the heart of the fetus, like the ticking of a clock, 120 beats per minute. It should be noted that the difference between abdominal aortic pulsation and abdominal aortic pulsation, which is consistent with the heart rate, 60 ≤ 100 beats per minute. Fetal Doppler are lower than 50% of the national ultrasound power difference standard, and radiation side effects are relatively small, and they are generally safe.

2. How to use fetal heartbeat for twins?
Fetal heartbeat is generally heard best on the back of the fetus. It also depends on the baby's fetal position. It is relatively difficult for twins to listen to the fetal heart rate. See the instruction manual for details. Operate in accordance with his requirements. It is recommended to go to the hospital for regular pregnancy check-ups and complete the check-ups, so that the situation can be found early, and the usual diet is light and rich, and easy to digest.
The fetal doppler for pregnant women can monitor the baby's fetal heart rate very well. Generally speaking, the location of the fetal doppler for twins is more difficult to find. When a pregnant woman is within five months of her pregnancy, if you want to listen to the fetal heart rate, you can try to hear it at the left and right sides of the abdominal midline below the belly button. At six to eight months of pregnancy, the position of the fetus may move upwards, causing the position of the fetal heart rate to move upwards. In addition, pregnant women can also judge the fetal heart rate from the position of the fetal movement. When the fetal movement is felt on the right side, the fetal heart rate It will be on the left side. If the fetal movement is felt on the left side, the fetal heart rate will be on the right side. By the third trimester of pregnancy, the fetal position is basically fixed.

3. How long can I use my fetal doppler?
General maternity hospitals provide fetal heart rate monitoring, and families can also perform fetal heart rate monitoring by themselves. It is mainly used to detect the instantaneous fetal heart rate of the fetus, the average fetal heart rate and the number of fetal movements. Pregnant women can use the fetal heart rate monitor from 12 weeks. This is because the fetus has not moved yet, so it is best to use the Doppler fetal heart rate monitor once a day. Use fetal heartbeat whenever you feel uncomfortable.