In the age of 13 weeks, the skin, muscle, and other part of the fetus body has been formed properly. The fetus can be able to feel the mother`s heart beat and it has 7,5 cm of length. The trachea, lungs, stomach, liver, pancreas, and the intestines start developing to the last function. The vocal cord starts to be formed, the tooth buds start to grow by forming 20 tooth buds, the finger of the hands and foods start appearing. Let see the following explanation to know the fetus development in each weeks for 4 moths.
The fetus development in the 14th weeks of pregnancy can be marked by:
- The fetus`s ears are in proper position, including the eye position leads to the actual position.
- Neck began to lengthen so that the chin is no longer integrated with the chest.
- The external genitals begin to be more real, therefore it will be easier to identify the fetus`s gender by ultrasound.
- The fetus heart beat rate beat is almost 2 times faster than your heart rate.
The fetus development in the 15th weeks of pregnancy can be marked by:
- The fetus can be able to listen the mother`s sound, heart-beat, and the sound of stomach.
- His hair is starting to grow, including the growth of the eye brow, eyelash, and the fetus weight is about 114 gram while the fetus length is about 15 cm.
- The woman pregnancy can be seen clearly during this period, therefore the woman should wear the loose clothes to make her becomes more comfortable. This is because the skin and muscles, especially around the stomach will stretch. It has an incredible stretch to accommodate uterus enlarged. The strain lines which is visible is called striae and it will appear on the abdomen, breasts, hips and back.
The fetus development in the 16th weeks of pregnancy can be marked by:
- The fetus length is about 16 cm and his weight is about 135 gram. It will grow immediately and make some strong movement because his muscles have been developed well. It can make the woman to be able to feel the fetus movement by groping her stomach smoothly.
- The lanugo grows in whole of the fetus body surface. The placenta is formed and start to function.
- The fetus has started sucking his thumb, yawn, stretch the body, swallow the urine, and hiccups.
- If you put a bright light on the baby's stomach, the baby will move his hand toward his eyes.
- The digestive system of the fetus begin to function.
Summary:
- 4 months fetus development phase begins from the 13th weeks of age until 16th weeks,
- The growth of the fetus who is 14th weeks of age characterized by the neck began to lengthen so that the chin is no longer integrated with the chest.
- The length of fetus in last gestation of 4 months is 15 cm long, the weight is about 135 grams.
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