What is the normal fetal heart rate for a three-month-old fetus? Normal fetal heart rate changes are a major indicator of fetal development and are involved in the diagnosis and monitoring of fetal health and maternal conditions. In the first two months of pregnancy, due to the small size of the fetus, the fetal heart rate is about 100-135 beats per minute. By three months, the fetal heart is gradually improving and the fetal heart rate will increase slightly. So, what is the normal fetal heart rate for a three-month-old fetus? Next, start from the following four