Is it okay to use a fetal heartbeat monitor to check the fetal heart rate every day by myself?

It is generally advisable to use a fetal Doppler at home for daily monitoring of the fetal heartbeat. The detailed explanation is as follows:

A fetal Doppler emits no radiation and typically operates on ultrasound principles to monitor the fetal heart rate, reflecting the fetus's growth status. Especially in the third trimester, when the fetus is nearly mature, it may be prone to respiratory distress; therefore, using a fetal Doppler two to three times daily is safe and unlikely to affect fetal development. This practice allows timely detection of any abnormalities. However, during the second trimester, when the fetus is still relatively small, daily monitoring is unnecessary—checking every two to three days is sufficient.

If any abnormal fetal heart rate occurs during pregnancy, prompt medical consultation is recommended. Relevant examinations should be conducted at the hospital, and targeted treatment should be initiated after a clear diagnosis is established.