What is the shape of the fetus in the third month?

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 What is the shape of the fetus in the third month?


What is the shape of the fetus in the third month

the weeks


The third month of pregnancy includes weeks from 9 to 13,  and the following is the shape of the fetus in the third month of pregnancy according to the number of weeks:


ninth week

What is the shape of the fetus in the third month

This week, the fetus is the size of a grape or an olive, its length from head to buttocks is about 1.6-1.8 cm, it weighs about 2 grams, and its activity increases, 

but the mother is unable to feel its movement and movement, possible during pregnancy. His heart rate was detected using measurements Manual doppler. 

Ultrasound-based handheld Doppler),  Here are some other developments expected this week: 


  • All major internal organs develop, including the brain, lungs, heart, intestines, and kidneys.
  • The genitals begin to take shape, but without imaging, the sex of the fetus may not be revealed, usually between 18-21 weeks of pregnancy.
  • Bones begin to form, arms of the fetus begin to develop, elbows appear, and at this stage the head is large and the jaw is underdeveloped.
  • The face appears more recognizable, a small mouth can be observed, and it is noted that the mouth at this stage has a tongue with very small taste buds, and the eyes are protected by eyelids.
  • The hands and feet are well developed, the fingers are not formed after this week, but small grooves will appear.
  • Hair follicles and the nipple are also formed at this stage.


tenth week


The size of the fetus this week has become about the size of an apricot, and its weight is about 4 grams, and it measures about 3.2 cm from head to buttocks,  

and this week is the last stage in which the fetus is called a fetus), as follows A statement of the most important formal and structural developments that passed through this stage:

What is the shape of the fetus in the third month

  • All major organs of the body continue to develop.
  • The fetus continues to move, and the doctor can monitor it during the examination. 
  • A fetus's heart beats at three times the rate of an adult's, with a heart rate of about 180 beats per minute at this point. 
  • The brain continues to grow and sits on top of the head, so its forehead bulges temporarily. It should be noted that the head of the fetus at this stage is about half its length. 
  • The jaws are shaped, almost all of the small deciduous teeth are formed and joined, and their hardening increases so that clinicians can distinguish them. 
  • The shapes of the eyes, mouth, and nose are clearly visible at this stage; As the eyelids continue to grow and close,  relative to the mouth, its upper lip is shaped and easily distinguishable, while the nose is still small enough to distinguish two small openings. 
  • The facial features of the fetus become clearer and more rounded,  its shape becomes more beautiful, the head remains large about the size of the body, and it should be noted that the outer ear is properly shaped and placed on top of the site.
  • Fingers and toes are getting longer, and the fetus can bend the elbow. 
  • It should be noted that the intestines of the fetus are wrapped, in addition, it is possible to clearly see the umbilical cord. 

eleventh week


This week, the fetus is about the size of a fig, weighs about 7 grams, and is about 4.1 cm long from head to soles of the feet.


  • The fetus continues to move, but the mother still does not feel it. 
  • The fingers are separated from each other after the network of skin that connects them begins to disappear. 
  • This week, his size has become more humane, with his body growing faster and more in line with the size of his larger head which is still larger than his body.
  • The nails continue to grow on the hands and feet, and the nails themselves begin to form,  and the hands and feet are located at the front of the body. 
  • The fetus's genitals continue to develop and the external genitalia begins to form, but doctors still can't detect the fetus's gender with ultrasound.
  • The eyelids continue to fuse and close during the week, separating and forming their final shape after the 24th week of pregnancy. 
  • Tooth buds may continue to form, taste buds continue to form, the nasal passages open with the tongue forming, but the ears remain small. 
  • Bone stiffness increases.


Twelfth week


This week witnessed a great development of the fetus, it is the size of a peach, weighs about 18 grams, and the length from head to buttocks is about 5.4 cm :


  • During this phase, his hormonal activity rises and his external genitalia appears. 
  • Some complex and subtle reflexes, such as the sucking reflex, develop and become competent.
  • It will continue to move even if the mother cannot feel it, and the mother may start to feel this movement between about 16-22 weeks of pregnancy. 
  • His skin is clear and thin at this point. 
  • Bones such as the long bones and the skull continue to harden.
  • The fetus's pituitary gland begins to produce hormones, and the placenta produces the hormones needed to continue the pregnancy. 
  • His liver started producing red blood cells and his kidneys started producing urine.
  • After being stretched, the intestines remain in their normal position in the abdomen as they were before this week and extend into the umbilical cord. 
  • His eyes are close together, his nails are fully developed,  
  • and vocal cords are beginning to form. 



Symptoms of pregnancy in the third month

Most of the pregnancy symptoms that a pregnant woman experiences during the first and second months of pregnancy continue to increase with the severity of some of these symptoms, especially nausea. 

Acne may also develop if a woman was able to develop before pregnancy, and the areola around the large and small nipples may swell and darken, as the shape of the breast continues to change and the areola increases in size, 

for the weight of a pregnant woman, it may not exceed one kilogram, concerning the possibility of different Weight gain rates If you are overweight or underweight before pregnancy, 

it is recommended that you consult your doctor at this stage on how to maintain an ideal and healthy weight during pregnancy.