Fetal growth from 4 to 40 weeks

Fetal growth

Finally after months of waiting; you get the good news- you are pregnant. You happily peer at the positive result of your pregnancy test kit from perhaps an online pharmacy. And after this, all you can think about is your baby and how it will grow each passing day/week. The growth of the baby during a certain period of time can be checked by the following scans:

1. Dating and Viability scan:
Dating and viability scans usually are done in the first semester of a pregnancy. A dating scan determines how many weeks pregnant you are, and your due-date (EDC-Expected Date of Confinement). Whereas viability scan is done to guarantee that growth of the baby is going smooth and normal.

2. Anomaly Scan (level 2 ultrasound):
It is also called as a mid-pregnancy scan, is done to examine each part of the fetus body and find abnormalities if any.

3. Growth scan or fetal wellbeing scan:
An ultrasound scan usually is done in the third semester to determine the fetal weight and other standard measurements. Also, baby’s breathing and movements can be monitored with the help of this scan.

The weeks of the pregnancy are measured from the first day of your last period.
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The growth of the baby can be clearly observed and monitored when divided into trimesters. The growth spectrum of the baby is as follows:

First Trimester(1-14 weeks):

From the process of fertilization, a zygote is born. A zygote is a cell formed by a combination of two cells. The zygote’s DNA has all the information about the gender, hair and eye color, height, and the skin tone of the child. An embryo gradually develops from the zygote within the first two weeks. In the third week, embryo’s heart starts beating. The baby has little arms, legs, ears, and eyes which can be seen. The hearing capacity of the baby gets fully developed by the end of the fourth week. Also, the respiratory system of the baby starts developing. The beginning of the spinal cord, nerves, and muscles is clearly visible. Nostrils and eye lenses start to form. The brainwave activity begins in the 8th week and the hands and the legs start to grow longer till the end of 10th week. Also, facial features begin to develop in the 11th week and up to the 14th week, the baby starts making its own blood cells, it gets tooth buds and has completely developed nose and eyes.

Second trimester(15-28 weeks):

All delicate details of the baby’s body, like hair, and fingernails grow from the 15 to the 21st week. Your baby can hear you talking or singing and can feel the pain. Also, you can notice your baby’s movements, as it becomes very active during this period.
Up to the 28th week, the baby’s hearing capacity and eyesight are fully developed. Also, the baby can create tears.

Third Trimester(29-40 weeks):

In the 29th week, the lungs of the baby are almost developed, which means the baby is capable of breathing. In 32nd week, the baby can control its eye movements, like opening and closing eyes. The baby sleeps with closed eyes while perceives the world during a day with open eyes. At the end of 37th week, the baby has fully developed muscles and bones. The baby could be born any day during the 38th week to the end of the 40th week.