What Should a Fetus Heart Rate Be

What Should a Fetus Heart Rate Be


Baby Heart Rate What Should it Be?

The heartbeat of a little life, that develops in the mother’s abdomen, is probably the most touching sound. Every woman listens to it for the first time with an inner trepidation. It is the heartbeat of a fetus during pregnancy, which helps to determine how your baby feels, whether he is happy or nervous.

In fact, it is one of the main indicators of the health of the developing fetus. Throughout pregnancy, doctors attach great importance to the heartbeat of an unborn baby and monitor it closely.

When Does the Heartbeat of the Fetus Become Distinct?

The development of the heart takes most time as this process is quite complex. The heart begins to emerge as early as on the fourth week of pregnancy. At this period, it resembles a hollow tube. The first heart beats begin on the fifth week. By the eighth or ninth week, the heart is already fully formed. It already consists of two ventricles, two auricles, and it is four-chamber.

However, unlike an adult human heart, each fetus has an open oval window between the right and the left auricles. In addition, since a baby is still not able to breathe, oxygen enters his body through an open arterial duct, which connects the pulmonary artery with an aorta. This gives an opportunity to provide all organs of the baby with oxygen. Immediately after the birth, this open arterial duct disappears.

What Kind of the Heartbeat Should a Fetus Have During Pregnancy?

As it has been already mentioned, the heartbeat is the main indicator of the well-being of a baby. The heartbeat should not be less than 85-100 beats or more than 200 beats per minute. The reduction of cardiac muscle contractions may be due to fetal hypoxia, pelvic presentation or fetus placental insufficiency.

In general, a very bad indicator is considered, if a heartbeat is not more than 70 beats per minute. Nevertheless, if there are deviations from the norm, it most likely indicates a serious threat to public health. If the heartbeat is not heard at all, it means a missed miscarriage.

How the Heartbeat of Fetus is Heard?

Fetal Heart Rate

Each week of pregnancy, the unborn baby’s heartbeat can be heard better. At each visit to the hospital, the doctor will closely monitor all indicators including decline in heart muscle. To hear the rattle of the little heart, one can use a fetoscope, which is a small tube with a wide funnel.

If a kid lies head down, the heart will be best audible slightly below the navel. Depending on which way he turns, the heartbeat can be heard on the right or on the left. If there is a transverse presentation, the heart is audible just at the level of the navel. If your baby is turned head up, the heart is audible in the area slightly above the navel.

At first, the heartbeat of your fetus during pregnancy is set via ultrasound. If you put a special sensor on the belly of an expectant mother, the heart beat is heard on the 6-7 week. The vaginal ultrasound provides an opportunity to hear the baby’s heartbeat already at the 5th or the 6th week.

During the first trimester, the number of heart beats is not changed. But over time, it increases. If on the 6th-8th week, it is 110-130 heart beats per minute, starting from the 11th week to the delivery, there are 140-160 heart beats per minute. It is associated with the development of the internal organs of the baby. In addition, on the last weeks, the number of heart beats depends on the activity of the fetus and on external factors affecting a pregnant woman, such as illness, heat or intense cold. If a kid feels a lack of oxygen, rapid heartbeat that significantly increases is changed by sharp dissipations.

Rhythmic heart beats are considered normal. If they occur at different intervals, they are irregular, then it’s either indicates fetal hypoxia or it is associated with congenital heart disease. The transient of heart beats must be clear and precise. The muted heart beat could also be due to the lack of oxygen. In addition, a poorly audible heart beat can be due to hypamnions or polyhydramnios, excessive thickness of the front wall of the mother`s belly or too high activity of the fetus. If the placenta is located on the front wall of the uterus, the heart beats will also be poorly heard.

With the development of the fetus, doctors carefully examine not only the number heart beats, but also the location of the heart in the chest. At earlier stages, the cardiography is carried out to explore the heart of the future baby in detail. Starting from the 32nd week, the cardiography is carried out, it allows to reveal the heartbeat of the fetus, as well as contractions of the uterus.

Video: Fetal Heart Rate Tone Monitoring Decelerations.