The fetus in the mother continuously makes respiratory movements, starting from the second trimester of pregnancy. While it is the glottis firmly closed, to avoid getting amniotic fluid in unopened underdeveloped lungs. Simulation of respiratory movements during this period is nothing more than a chest workouts to work on providing the baby with oxygen immediately after birth.
Use your easy baby before birth is not able, as they are revealed only at the moment of his first cry. Children born prematurely may experience serious breathing problems as a special substance, a surfactant, providing the opening and the surface tension of the lung tissue, begins to produce fruit only at 34 weeks of pregnancy. There are special drugs that speed up the synthesis of this substance as well as artificial surfactant, but it only helps to survive in preterm children, without affecting fetal breathing.
Once the lungs are not involved in prenatal baby's breath, then breathe it in a completely different way. Already in the first weeks of pregnancy develops a totally unique organ, the placenta, providing the fetus with all necessary for life, including oxygen. Through the placenta oxygen is transferred from the blood system of the mother into the blood of her child. Actually, a pregnant woman breathes for two, it's her lungs fill with air are both of body.
The placenta is arranged in such a way that supports the baby comfortable existence, even in the case where the oxygen consumption of the mother for any reason is limited. That's why pregnant women have an increased tendency to fainting due to inadequate oxygen to the brain. In stuffy or smoky rooms of oxygen in the air is much less, and the volume of respiration remains the same, and to provide the child, the placenta takes oxygen to the detriment of the mother.
Advice 2: How to calculate the weight of the baby in the womb
Long before the birth of the baby parents wondering what baby feels, what he hears, which of your parents will be like, how tall and how much weight. This interest is due not only to parental love, but also concern about the health of the crumbs properly it develops. To find out the weight of the baby in the womb, you can access the statistics either to a specialist at a local clinic, and it is possible to calculate the approximate values by yourself in simple way.
You will need
- - the tape;
- - a sheet of paper and a pen;
Ask your doctor, under supervision of which are the height of the uterine fundus. This value is the distance from the upper edge of the symphysis to the uterine fundus (the upper part). Lock this value for calculations, name it VM.
Conduct the appropriate measurements. Measure with measuring tape the circumference of the abdomen at waist level. Fix the result, denote the resulting value as the value of the Coolant. Measure the circumference of your wrist at the hand. If the value obtained is less than 16 cm, the coefficient will be equal to 12, if more than 16 cm is the coefficient And takes a value of 11.
For the precision required result settle on the three formulas and calculate the arithmetic mean. The first value to calculate: multiply the value of VM to the value of the Coolant obtained as a result fix the value of P1. Calculate the value of the second formula: the sum of VM and Coolant, divide by 4 and multiply by 100, record the obtained value as P2. For the calculation the third method (value of R3) subtract from the value of the VM coefficient value And the resulting number multiply by 155.
Calculate the arithmetic average: add the values of the variables P1, P2 and P3, and divide the result of adding 3. This will be the estimated weight of the fetus at the moment. The error may be about 200 grams.
Calculation by this method yields reliable results only in the later stages of pregnancy, closer to 37 weeks, that is, when the amount of amniotic fluid becomes less.
If the term of your pregnancy is not less than 11 weeks to know the approximate weight of the child can apply to the specialist in the clinic. Based on the results of the ultrasound the doctor will determine the size of the fetus (biparietal head size, length, hip and chest diameter), and knowing the pregnancy can into account the number of weeks to calculate all of the fruit according to the method Hadaka.