When is the latest time for fetal heartbeat to appear medically?

When pregnant women are doing fetal heart monitoring, they must pay attention to relevant matters. First of all, pregnant women must pay attention to rest before the examination, and also ensure that they have no other diseases. For example, when a pregnant woman has a fever, the fetal heart rate may become abnormal. In addition, in the early stages of pregnancy, the fetal heart rate will definitely not be detected, so you must wait for a certain period of time. Most pregnant women will have a fetal heart rate between 6 and 8 weeks of pregnancy, so when will the fetal heart rate appear at the latest?

When is the latest time for fetal heartbeat to appear medically?

Fetal heart rate is an important criterion for detecting whether the fetus is healthy and its growth. However, there are many reasons that may cause the fetal heart rate to not appear, or to appear very late. If the fetal heart rate does not appear, it is necessary to first find out the reason for the absence before performing an abortion. Generally speaking, the earliest fetal heartbeat can be seen at six weeks, and the latest at eight weeks. If there is still no fetal heartbeat at eight weeks, you must find out the reason under the guidance of a doctor.

Generally speaking, fetal heartbeat and fetal bud are important signs of the baby's healthy development. However, there are many times when the baby stops developing due to various reasons, and the fetal heartbeat and fetal bud will not appear. There are two manifestations of embryonic development cessation. The first is continuous vaginal bleeding. The second is that although there are no symptoms of vaginal bleeding, an ultrasound will reveal that the embryo has stopped developing and there is no embryonic bud or fetal heartbeat. In this case, most people don't feel anything, so it is recommended to go to the hospital for a check-up.

We know that when the fetus develops normally, it will have a fetal heart rate, which is the baby's heartbeat. The normal fetal heart rate is between 120 and 160. The fetal heartbeat can be heard at around 12 weeks, and later at 18 weeks. Many doctors now point out that if the fetal heart rate is lower than 140, then the baby is a boy, because generally speaking, a girl's heart rate is higher than that of a boy. However, such a test may not be completely accurate.

How to listen to the fetal heart rate

The fetal heart rate is the heartbeat of the fetus. The fetal heart begins beating three or four weeks after pregnancy. It was slow at first, only sixty or seventy times a minute. The heartbeat at this time is very weak, and during B-ultrasound examination, the fetal heartbeat can be displayed on the ultrasound screen. At the beginning, you can't hear it with an ordinary stethoscope because the baby is too small. You can use a Doppler stethoscope to listen, or listen to the fetal heart rate under the guidance of a professional. Let’s take a look at how to listen to the fetal heart rate.

After 8 weeks of pregnancy, the fetal heart rate can reach about 180 beats per minute. After 14 weeks of pregnancy, the fetal heart rate drops to about 140 beats per minute, and then remains between 120 and 160 beats per minute. In addition to listening to the fetal heart rate directly with a stethoscope, doctors can also use a Doppler fetal heart rate detector to measure the fetal heart rate.

When the pregnancy is about four months, the fetal heartbeat can be heard near the midline below the navel. Later, as the fetus grows and the fetal position changes, the position of the fetal heart will also change. Because most fetal heart sounds are transmitted from the fetal back and can be heard most clearly near the shoulder blades on the fetal back, the fetal head in head position can be listened to on both sides of the lower abdomen, the fetal head in breech position can be listened to on both sides of the upper abdomen, and the fetal head in lateral position can be listened to at the midline of the abdomen above or below the navel.

The normal fetal heart rate is 120 to 160 beats per minute. If it is too fast, too slow or irregular, it means that the fetus may be suffering from intrauterine hypoxia or asphyxia, and timely medical treatment must be sought.