What is the latest time for fetal fetal heart rate check? Fetal embryo and fetal heart rate examination is an essential part of pregnancy examination. By checking the development of the fetus and whether the fetal heart rate is normal, problems can be discovered in time and corresponding measures can be taken. However, many expectant mothers do not know the latest time for fetal fetal heart rate examination. Below we will elaborate on it from several aspects. From the perspective of pregnancy stages, pregnancy can be divided into three stages: first trimester, second trimester and third trimester. Fetal embryo and fetal heart rate examination is very important in the early stages of pregnancy, because this stage is the period when fetal organs are forming and growing fastest, and timely examination is required.