How long does it take for fetal heartbeat and embryo to appear during pregnancy?

After pregnancy, pregnant parents pay special attention to the condition of the fetus every month. According to the normal growth and development of the fetus, the gestational sac will usually form around 30 days of pregnancy, the fetal bud and fetal heartbeat will begin to form around 40 days, and the fetal heartbeat will appear around 50-60 days. So, when is the latest time for the fetal bud and fetal heartbeat to appear in the early pregnancy?

How long does it take for a fetal heartbeat to appear during pregnancy?

First of all, the reflection of the fetal heart rate and fetal heartbeat shows the growth and development of the fetus in the mother's abdomen. Therefore, expectant mothers will pay special attention to it in the early stages of pregnancy. Before 8 weeks of pregnancy, it is called the test tube embryo; at 4 weeks, it is called the embryonic bud and fetal heart stage. With the growth and development of the test tube embryo, the expectant mother can see the gestational sac at 30-40 days, the fetal bud and fetal heartbeat at 40-50 days, and the fetal heartbeat at 50-60 days. Therefore, the fetal bud, fetal heartbeat, gestational sac and fetal heartbeat can be seen by B-ultrasound at about 60 days.

Secondly, the first fetal heartbeat can be seen at 6 weeks of pregnancy, and the latest can be observed at 8 weeks. Seeing the fetal heartbeat is the basis for diagnosing pregnancy in the early stages of pregnancy and confirms that the fetus is alive. If the fetal heartbeat and fetal heart rate have not been observed at 7 weeks of pregnancy, then a follow-up ultrasound should be performed to check whether the embryo is developing well.

Finally, if vaginal bleeding occurs during pregnancy or B-ultrasound examination finds fetal arrest, with no fetal heartbeat or fetal heart rate, you need to go to the hospital for examination immediately, and after diagnosis, receive treatment or surgery according to the doctor's advice.

How long does it take to hear the heartbeat during pregnancy?

During the third or fourth week of pregnancy, the fetus' heart begins to beat. It was slow at first, only sixty or seventy times a minute. The heart beats are very weak at this time, and during B-ultrasound examination, the fetal heartbeat can be displayed on the B-ultrasound screen. Generally, the fetal heartbeat can be heard around the center line below the navel. Later, the position of the fetal heartbeat will change with the growth and development of the fetus and the different fetal positions. Because fetal heart sounds are mostly transmitted from the fetal back and can be heard most clearly near the shoulder bones on the fetal back, the head of a fetus in head position can be listened to on both sides of the lower abdomen, the head of a fetus in breech position can be listened to on both sides of the upper abdomen, and the lateral position can be listened to at the midline of the abdomen above or below the navel.

At about 17-20 weeks, you can use normal auscultation to hear the fetal heartbeat in the abdomen. The normal fetal heart rate is regular and strong, like the ticking of a clock, which is 120-160 times/minute. If it is <120 beats/minute or >160 beats/minute, you can listen to it repeatedly at intervals of 10-20 minutes. If it is still abnormal, it indicates that the fetus is suffering from intrauterine hypoxia. If the fetal heart rate is in the abnormal range and is accompanied by irregular fetal heart rate, it indicates that the fetus is suffering from more serious intrauterine hypoxia. If the fetal heart rate remains <120/min or >160/min for more than 10 minutes, it means that the fetal heart rate is abnormal. The use of fetal heart rate monitors has become quite popular. During fetal heart rate monitoring, if an abnormality is found in the fetal heart rate graph, it is often used to indicate fetal heart rate abnormalities. In most cases, abnormal fetal heartbeat means that the fetus is suffering from insufficient oxygen in the uterine cavity. The more severe the abnormal fetal heartbeat is, the more severe the fetal intrauterine hypoxia is. However, not all abnormal fetal heartbeat is caused by insufficient oxygen.

In addition, the physical condition of the expectant mother will also affect the changes in the fetal heartbeat. If the pregnant mother has a fever or a cold, the fetal heartbeat will often exceed 160 beats/minute. If the pregnant mother has a relatively hyperactive thyroid hormone, her own heartbeat will be rapid, and the fetal heartbeat will often exceed 160 beats/minute.