Fetus at 38 weeks gestation

The 38th week of pregnancy is exactly 36 weeks of embryonic development of the crumbs. That is how much time it grows and develops inside the mother’s womb. During this time, the baby has come a long way, completely repeating the entire evolution of humanity.

What he has become and what is happening to him now, we will tell in this material.

Weight and height

The fetus at the 38th week of pregnancy is fully prepared for independent life outside of my mother’s abdomen. ROdes can happen at any time, and you should not be afraid of it – they will not be considered premature, after all, the baby is fully matured.

What are his height and weight, is difficult to answer. The time of embryonic development passed, when all the crumbs grew at about the same speed.

Now the size of the baby is purely individual and depends on two components: heredity and health.

If mom and dad have crumbs solid form, then the little crumbs will not. If the parents are tiny, then the baby will be small. The weight of the fetus, while it is in the mother’s womb, is difficult to determine, therefore, such a concept as “estimated weight” is used.

It assumes its program embedded in the ultrasound scanner. According to the size of the individual parts of the child’s body, she first gives an opinion on the possible mass of his body. Note that the error in this case is about 14% of the child’s body mass up or down.

On average, babies at 38 obstetric week weigh more than 3 kilograms (3200-3600 g). Height is 48-50 cm. A large fruit in this period already weighs about 4 kilograms, and its growth can be 55-56 centimeters. If the pregnancy is difficult – with preeclampsia, Rh-conflict, intrauterine growth retardation, the weight may be small for a given period – within 2600-2800 grams.

Fetometry on ultrasound – norms

Ultrasound on this period is done to clarify the expected date of birth, to assess the degree of maturity of the lungs of the baby and to study the characteristics of the placenta, which “works” at the limit of its capabilities – its inevitable aging began.

Fetometric indicators of the baby at this time are as follows:

  • bipartial head size (BPR) on average – 93-94 mm;
  • frontal occipital size (LZR) – 110-118 mm;
  • thigh length – 74-75 mm;
  • bone length – 64-65 mm;
  • tummy circumference – 330-336 mm;
  • Head circumference – 330-333 mm
  • chest diameter – 101 mm.

At 37-38 week there are no strict norms, because the constitution is also an individual trait.

In some babies, the length of the hip will be more than the norm just because the baby has inherited long legs, and the other has a head less than the norm, because everyone in the family has small neat heads, so the data presented above are just average numbers.

Fetus at 38 weeks gestation

At 38 weeks gestation, the baby looks like a fully formed little person. That is how mom will see him very soon, nothing will change in his appearance.

The skin of the crumbs acquired a pink, delicate shade; they are no longer red or wrinkled. Wrinkles smoothed out due to the fact that for the third trimester the baby has accumulated a large amount of subcutaneous fat, for the same reason the skin color has changed.

The blood vessels with the advent of “fatty layer” have become farther from the skin surface, the redness and the grid of blood vessels are now almost not visible.

Some the palms and heels remained wrinkled, but they will remain so after giving birth at least another 1-2 months. More recently, the entire body of a child and his face covered with white thick original lubricant. She protected thin, as parchment, skin from the negative impact of various factors. Now there is no lubrication. It remained in small quantities only where there is a chance of friction – in the folds of the skin in the groin, under the knees, in the crook of the upper limbs and just a little bit in the neck fold.

In 98% of boys, by the 38th week, the testicles descended into the scrotum, This fact can certify the doctor of ultrasound diagnosis. For the rest, the testicles may drop to 40 weeks or after childbirth.

In girls at 38 weeks gestation, the labia minora is covered with large, This is the main sign of the correct development of the external genital organs in female fetuses.

Both the labia and the scrotum can be slightly enlarged, since right now a large amount of estrogen is produced in the maternal organism – hormones that help the mother’s body to prepare for childbirth. The side effect of these hormones is a slight swelling of the genitals and mammary glands of the fetus.

The amount of hair on the head may be different. There are kids with a solid and funny head of hair, and there are crumbs bald, this is a genetic feature. But all the babies this week have rather long and sharp fingernails, and they continue to grow.

Lanugo – a small down that covered the entire body of a baby, disappears completely at week 38. The skin becomes smooth and tender.

The facial skeleton and facial muscles are fully formed. The three-dimensional image of the ultrasound clearly shows which of the parents looks like a child, and if you make a four-dimensional ultrasound, you can enjoy the variety of grimaces and facial movements, which the crumb now “perfectly owns”.

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