Pregnancy is the most beautiful time in the life of every woman. It has long been known that the pregnancy calendar is designed for nine months, but in gynecology it is considered somewhat different. The entire period of pregnancy is divided by doctors for 40 weeks, i.ะต. the pregnancy calendar is ten lunar months.
Therefore, it is considered that the pregnancy period lasts ten months, not nine. It is easier to measure the remaining time until the birth by weeks.
The cycle of pregnancy will be divided into trimesters, in the first trimester a woman begins to feel the changes that occur in her body; in the second - the first weak movements of the baby inside it; and, finally, the third trimester is the most exciting, as a woman prepares for childbirth.
Newly mum in the first days of pregnancy doubts the very fact of pregnancy, as judged by the delay in menstruation. But in fact there are many signs that after nine months you will become a mother.
First you find a long delay in menstruation, you become weaker, and you always want to sleep; you notice behind yourself sudden mood swings, some tearfulness and nervousness; there is dizziness and nausea, and then you feel that your breasts become thicker and more sensitive. Let's talk about how the stomach grows during pregnancy by week.
So, the first four weeks of pregnancy there is a division of cells, after which the formation of three germinal sheets begins, from which the formation of tissues and organs of the baby will begin later. First, a "model" of the future spine and skeletal muscles, cartilage, vessels and all organs is formed. From the other two cells begins the formation of skin, all external tissues; these cells give the development of the child's nervous system. From these, dividing cells, the digestive system is also created. Closer to the end of the first month, there is an establishment of regular circulation of embryonic blood, the umbilical cord is formed, in this period there are already rudiments of hands and feet, eye grooves; there is development of digestive organs, liver, urinary tract and kidneys.
From the fifth to the eighth week, the fruit receives nutrients through the placenta and umbilical cord from the mother's blood, and oxygen flows directly through the walls of the uterus. The fruit actively begins to gain weight, adding an average of 3 millimeters per day. During these weeks, the production of amniotic fluid starts, through which the metabolism of the fetus takes place. The amniotic fluid acts as a barrier against harmful substances. In the first months of development of the baby, the amniotic fluid in the sac occupies much more space than the fetus itself. The more a child becomes in the mother's belly, the more space it takes and soon does not swim in the amniotic fluid.
Beginning with the ninth week , the child grows to the full, his face is formed, and limbs are clearly visible. The skin of the baby still does not look very nice, because it is red and wrinkled. All internal organs of the child have already been formed, ear lobes and eyelids have appeared. The child actively moves and can make simple gestures with his hands. The kid can open and close his mouth, inflate his lips; he already knows how to suck, surrounding his amniotic fluid.
The second trimester of pregnancy begins , which seems to prove the passage of the initial level of pregnancy. During this period, cardinal changes take place in the body of the mother and child. This is an important moment in the formation of the main arteries and blood vessels in the baby. The fetus has the first fluff on the body, and the hair on the head is formed. The entire main system of the child is practically formed, the motor skills of the arms and legs are significantly improved. The length of the child during this period is approximately sixteen centimeters. So, the thirteenth week of pregnancy has gone, what interesting does it bring with itself? The fetus continues to actively gain weight, around the eighteenth week, it is gaining 200 grams. There is a formation of the jaw and future teeth, phalanges of the fingers of the feet and hands are formed. And on the pads of the fingers there is already a personal imprint. From pushkovyh hair gradually generates grease white-cream color, it protects the skin of the child from external adverse effects. Now the little one can already open his eyes to look around. The rumor is not yet fully formed, but the baby can already hear bright and loud sounds.
I went twenty-first week of pregnancy . The crumb begins, there is not enough free space in the mother's belly, he jumps with might and main, in the sixth month these senses are felt much more strongly. Following the reflexes, the child tries to turn his head down, but such activity of the baby should please mom, as it confirms that the child is properly developing. By the twenty-fourth week of pregnancy the baby already looks externally the way it will look before birth.
By the twenty-sixth week, your baby weighs almost a kilogram, and his height is approaching a mark of forty centimeters. Now he is very much like a man. For the present the skin remains wrinkled, but under it a protective layer of fat has already formed. Now there is a formation of the muscular tissue of the child, during this period the baby sleeps most of the time, the development of the cerebral cortex is under way. Gradually, the lungs develop, but during this period they are still weak enough.
On the thirty-second week of pregnancy, the child has already formed all the organs, but their "development" occurs, the nervous system, the urethra is fully formed, the nails grow on the hands and feet of the baby. Starting from this time period, the crumb begins to add twenty-eight grams per day. The doctor - the gynecologist probes your stomach, measures it and makes calculations. Usually the approximate height and weight of the baby, calculated by the doctor, coincides with the reality. Your stomach has become large, you feel heaviness in your legs and back pain. This is the normal course of pregnancy on a calendar shortly before birth. Soon you will be able to hold your baby in your arms.
Now you know how your abdomen will grow during pregnancy by the week, and you will no longer be waited for by various surprises. Remember, the main thing is that the child is loved and long-awaited, then you will not be afraid of any changes in the body that take place during pregnancy.