4 week of pregnancy: what happens to the fruit and what a woman feels | Signs and sensations at the 4th week of pregnancy

So, 4 weeks of pregnancy occurred. What happens at this stage? First, the uterine egg attached to the wall can now be bolded by the embryo. True, it still does not look like a small little man, rather, resembles a flat disk, which consists of three layers (germinal leaflets). Each layer in the process of growth and development of the embryo is converted into internal organs. The cells of the inner layer (endoderma) are the future digestive tract, the liver, pancreative and thyroid gland, the organs of the respiratory system of your baby. The cells of the middle layer (mesoderm) will form a bone skeleton, connecting and muscle tissue, blood circulatory and excretory systems and organs of the sexual system.

Fourth week is actively growing not only the baby, but also a placenta, without which the development of pregnancy and the survival of the fetus would be impossible. Thanks to the placenta, the embryo receives all the necessary nutrients from the mother's body, with its help it breathes. Placentating is a long process that will complete by the 12th week of pregnancy.

Week: the appearance of the first signs of pregnancy

At this time, the future mother can start recognizing the first signs of pregnancy. The most classic - monthly delay. If you have a delay at least one day, you can make a pregnancy test or pass the blood to hCG. In the gynecological examination, the pregnancy in the early deadlines is quite difficult to determine, the results can be very ambiguous. The ultrasound at 4 week of pregnancy is also still little informative, but it can help recognize ectopic pregnancy correctly diagnose.

What happens with the embryo at pregnancy week

• The first layer will become the brain, nervous system, skin, eyes, ears;
• second - light, stomach, intestine;
• the third - heart, blood, muscles and bones.

So, fertilized egg starts moving: for 4-5 days it should get to the uterus. After 8 days, the egg cell will highlight the mucus - the substance that gives the body of the mother's organism about the presence of a new creature in the uterus with its set of genes other than in which it lives and develops. The tiny creature seems to say mom: "I'm here! I came! Please guise me and make me so that I was good and comfortable." And the mother's body includes a complex system that grinding millions of years, and each element is responsible for the well-being of the birth life.

Comfortable medium is created almost immediately - in the form of an amniotic fluid, which in composition resembles sea water. Amniotic fluid retains a constant temperature and provides sufficient space to move the kid almost until the very end of pregnancy.

Already in the first 8 days inside the egg, extraordinary changes are rapidly occur. Shortly after fertilization, for the 4-5th day, a cellular compound is formed - blastocyst, from which a tiny creature will continue to develop. Blastocyst unites various cells that are grouped first two, and then in three layers, or three petals. Each of these layers of petals will continue to develop in various parts of the child's body:

Three petals are gaining strength, and in two weeks are ready for a new high-quality jump: a very responsible development period begins, which will last with the third on the sixth week of life before birth.

Pregnancy Calculation Methods

The main method of determining the term of pregnancy is a method used by a gynecologist of the female consultation, or an obstetric method. It calculates the term of pregnancy from the first day of the last menstruation and assigns planned instrumental and laboratory research, based on this date.

The embryonic method of counting takes the point of reference to the date of ovulation and lags behind the obstetric period for about 2 weeks. Women can assume that their pregnancy has started on that day when the expected menstruation did not come. In order not to make confusion, communicating with the doctor, it is recommended to stick to the obstetric method.

What happens to the fruit on this time?

In the obstetric method at 4 week of the zygote, or a fertilized egg, starts to sharing violently. It produces many cells with different buildings and functions. Actually, it is not yet fruit. The accumulation of cells is called Morula, or blastocyan. In shape, it resembles a multi-chamber berriety, not yet attached to the endometry of the uterus. It is difficult to call the exact parameters of blastocysts, as it is continuously growing.

At 4 week of pregnancy, the implantation of a fetal egg in the uterine cavity continues. The endometrium is implanted with a spherical conglomerate of the blastocyst cells representing the early stage of the development of the embryo (embryo). From this point on pregnancy, the embryo begins to release a hormone, which is called human chorionic gonadotropin (HCG). It ensures the further existence of a yellow body and the production of estrogen and progesterone preventing debris. The presence of HCG in the blood or the urine of a woman is a faithful sign of pregnancy.

The embryo is still stronger in the uterus. From this point on, he begins, including to eat at the expense of the parent body. Now there is an extremely important stage of development: from a fruit egg your child begins to turn into a real embryo. By the end of the 4th week of pregnancy, it is possible to identify the embryo on the ultrasound (stage "primary strip", a germ disc). At this stage, you can consider the amniotic cavity, the embryo in the form of a "rice grain" and attaching a stalk. For this week, the babe will grow from 0.36 to 1-1.5 mm, and will be the size of the poppy grains.

implantation in a number of women may be accompanied by the release of a minor amount of blood (oscillations, meager sections). If implantation fails, the early miscarriage occurs, which flows as another menstruation, with a possible delay of several days.

At the 4th week of pregnancy, the process of implantation blastocysts continues. The main goal of this process is the establishment of cramped ties with blood vessels of the uterus. Usually, implantation occurs in the endometrium of the rear wall of the uterus, and in its site where there is quite large blood vessels.

The fastest development and rapid growth of the child is committed immediately after implantation (implementation) of the embryo in the wall of the uterus. Scientists were calculated that if the growth and development of the child during the pregnancy was proceeded so intensively, as in the first 7 weeks - by the time of birth, the weight of the newborn would be 14 tons - this is the weight of two elephants. . .

In the course of implantation, the type of nutrition is changed. For a short time after fertilization, the embryo uses small nutrient reserves of the nutrients contained in the egg (autotrophic power type). After spending the material of the yolk inclusions, the embryo moves to the histotrophic type of power, using the secret of the mucous cells of the epithelium of the egg, uterus, as well as the uterine glands, and tissue decay products in the initial implantation phase. Finally, after the destruction of the endometrial vessels, the hemotrophic type of nutrition is installed.

Blastocyst destroys the wall of the uterus, and as it were, "digging" for himself a small "fossa", after which it is completely immersed in it. The outer cells of the bubble are growing, like roots, into the mucous membrane of the uterus, where they quickly grow and branches, small blood vessels are formed in them.

calculations for different techniques

Sometimes women consider the term since the delay. Then the fourth week will mean the eighth obstetric or sixth embryonic. Easy to get confused? Then it is better to stick to a medical point of view. After all, the future mother is to communicate with doctors quite often.

Fruit size: more than one cell

As soon as the spermatozoon fertilizes the egg, the stormy division of the zygota begins. If you think about it, then this is a miracle. One sole cell forms many others. They are completely different, and their roles are different. And every cell "knows", where she is and what to do.

If the 4th obstetric week is going, then the fruit speak early. The zygote is gradually moving into the embryo stage. Now the future child is an almost invisible lump of cells, which scientists call Morula. Under the microscope, it will be similar to the berry, covered with "sinks". If the mournal fixes in the uterine cavity has not yet happened, it will definitely take place. And then the real cell magic will begin.

The size of the future fetus on the 4th obstetric post is comparable to the "Poppy Grankoo". Its weight is about 0.5 g, and height is 0.36-1 mm. However, it is literally momentous data. The embryo increases rapidly due to the permanent cell division.

signs and symptoms

In obstetric practice, the fourth week of pregnancy is equal to two weeks of pregnancy from conception. The actual pregnancy has already arrived, the embryo is still classified as an embryo, but in the uterus it has already fixed. Now his development is inevitable, and with each new week, including 4 weeks, the woman will increasingly feel gradual growth in her new life. In the meantime, the first 4 weeks of pregnancy usually for a woman almost imperceptibly. Although in some cases the pregnancy, there are still not strongly expressed symptoms and signs.

Some signs and symptoms of pregnancy for 4 weeks are similar to symptoms before menstruation. So, a woman can notice the irritability and nervousness that has grown, fast fatigue. In rare cases, there may be a change in taste preferences and light nausea - especially in connection with the intolerance of certain odors.

feeling at pregnancy week

Emotional Women's Emotional Background changes: if some of the women do not suspect the presence of pregnancy for 4 weeks, then other sensations at the 4th week of pregnancy can be significantly more pronounced. Flasiness, undefree syradiability, an increased emotional reaction to annoying factors - all this may indicate "arrangement" in the womb of the embryo, which in the future will turn into a small man.

Separate changes undergoes the chest: the swelling of the mammary glands is noted, sensitivity and sacrifices of nipples appear. Again, these changes can be explained by premenstrual syndrome, if a woman about pregnancy has not yet known. In fact, the chest at the 4th week of pregnancy varies due to the hormonal restructuring of the body, adapting to new conditions for further functioning.

Pregnancy Week: What happens on this period

The period of pregnancy is traditionally calculated by the obstetric method. Gynecologists consider the first day of the last menstruation preceding the first day of the last menstruation. The female women themselves prefer to use the embryonic method in order to calculate the duration of childbirth in order to accurately - here the calculation comes from the day of the alleged ovulation. But the embryonic count is so inaccurate that it is better to adhere to a medical point of view in this matter.

So, 4 obstetric weeks - just 2 embryonic week. By this deadline, the future mother has not yet guessed his interesting position. But when planning and successful fertilization, it is already trying to find sensations confirming pregnancy. And they will not force themselves to wait - the first symptoms of early toxicosis can already arise, especially at primordin.

During this period, a moment occurs when a woman begins to make sure of its new condition, physically and mentally adapts to it. To pregnancy proceeds safely, the future mother requires care and attention of loved ones, avoiding stress and reducing the daily load.

Development of embryo during pregnancy week

4 Obsteric Week - Critical Time for the Development of Pregnancy. It is on this time that the main fabrics and the necessary organs are laid: the primary intestine, the cartridges of the future skeleton, the rigging bones, kidneys and the thyroid gland. The structure of the nervous tube formed last week is complicated. It is important that this stage of the intrauterine development of the child has passed safely - the health of the future kid depends on this.

4 week of obstetric pregnancy is actually the second week who has passed since the conception occurred. On this period of "interesting situation", you can already talk about how about the fact that happened.

However, it is only the beginning of a complex and exciting way, because there are still 8 months of tooling the future crumbs. By this time, the embryo is already securely attached to the endometry and begins to actively develop, providing a significant impact on the body of the future milf.

Introduction

Symptoms of pregnancy for 4 weeks after conception becomes much more visible than on previous weeks. For this period, significant changes in the body of a pregnant woman are characterized. A special dominant is formed in the cerebral cortex, which throughout the duration of the fetal tool through the CNS creates favorable conditions for the growth and development of the kid.

And even if the woman was active, cheerful and dynamic, then it will turn into a calm and melancholic domide. Although some women, such changes relating to the nervous system manifest only partially. Also begins to change appetite and the intolerance to some odors and products arises. Sometimes it is enough to see a certain dish and to the throat will begin to pump com.

pregnancy weeks: symptoms, signs and sensations

Toxicosis appears at the 4th week of pregnancy, which is pretty spoils life to many future moms throughout the first trimester. Often, attacks are in the morning and most often they are accompanied by vomiting. Even an awkward touch of the brush when cleaning the teeth causes vomit urge.

changes and emotional terms occur. The future mommy of himself can withdraw even the most common occasion, provoking hysterics and tears at the same time. Some women have a tendency to depressions. Gynecologists note that those women who suffered from manifestations of PMS to pregnancy are most similar to such changes.

Horiotropin is already beginning to develop more actively, although it is still not much in the urine, but still some sensitive pregnancy tests can establish the presence of an embryo in the uterus. However, only laboratory analysis of blood serum on this hormone will help determine accurate results.

Also, signs of pregnancy for 4 weeks are also manifested in the loading of the mammary glands due to hormonal changes. These symptoms appear before menstruation, but during the tooling of the fetus they have more pronounced severity. So, it happens because the hormones prepare the breasts to feed the future offspring.

Some women pull the belly at the 4th week of pregnancy and chronic fatigue appears. Everyone, without exception, there is a delay in menstruation and an increase in the temperature basal indicators, which are designed to inform the future mom, that it is wearing under the heart of the long-awaited crumb.

Mom's feelings at pregnancy week

To talk about any external changes at the 4th week of pregnancy is still too early, the stomach at the 4th week of pregnancy does not increase in size, but your feelings can already change in such a small time.

As a rule, during pregnancy your psychological state becomes unstable, any trifle can cause tears, at the same time, you feel fatigue even after the walk, you want to sleep, damn in a secluded corner. WINDOW All hormones.