In medical practice, it is customary to use an obstetric (calendar) and embryonic racing period of development of pregnancy. This is a simple mathematical counting. Obstetric period is calculated from the beginning of the last menstruation, taking into account the cycle. Fertilization does not always occur at this stage. It can happen after 14-18 days. It depends on the time of the onset of ovulation in a woman. You can learn about the coming pregnancy, measuring basal temperature. Tests and analysis of hCG at the same time will not show the occurrence of conception, since in the body of a woman at this time only preparation for future pregnancy occurs.
Pregnancy diary for weeks is under construction from the process. The fusion of the sperm and eggs occurs in the uterine tube. After connecting the male and female cell, the zygota is formed. It is the basis for the development of the baby, all its bodies and systems. At the same time, the first changes begin in the body of the woman. From 5-6 fertilization day, a hormonal background is changing. The woman begins to produce hCG. Immunity of the future mother decreases, which is normal organism reactions to protect the fetus from rejection.
In the first week, a woman does not feel any major changes. Therefore, accurately calculate the date of conception is hard. An extremely rarely future mother may feel signs of toxicosis, a change in taste and smell. In some moms, the chest swells, the sensitivity of the nipples increases, there are experiencing sensations at the bottom of the abdomen. A woman, as a rule, leads an active lifestyle, drowsiness and change of emotional background are not yet available.
If you take an obstetric period, then the second week of pregnancy is the period of conception. It is at this time that a woman comes ovulation. The ovary produces a female cage that is sent to the uterine tube. There it expects fertilization within 24 hours. Men's cells - spermatozoa, live longer. They remain active up to five days. When they meet, conception occurs. If the fertilization did not happen, after 2 weeks, the unoppoded egg is derived from the body with menstruation.
Each of us was such a cell, and all our "parameters": the structure of all organism proteins, gender, blood type, eye color, foot size, taste and future talents - are determined by genetic code, 46 chromosomes. Further, the person is only growing and developing, getting oxygen and nutrition. He is predetermined to live 9 months in the womb and about 90 years outside of her womb. From the very moment of conception, each person is a unique being that has never existed in history and will never exist again!
A day, the greater two, the egg reaches a wide part of the pipe - ampoules. This is the most suitable place to fertilize. There is no expectation of nature: either the egg fertilizer is fertilized and the embryo is moving along the ovage, or an uninterrupted egg dies.
The second part of this great drama emergence of a new life - or rather the preludes to it - begins in the male gerbal gland - the seed, where men's germ cells are formed - spermatozoa. With a current of seed fluid, male sex cells are transported to the appendage of the seed, and here there are their final maturation, accumulation and storage. In the eruption of sperm (ejaculation), the seminal fluid concentrate is diluted with the secretions of other male genital glands - seed bubbles and prostate. On 1 ml of sperm (ejaculate) there are 50-170 million spermatozoa, which is 10-20% of the ejaculate volume. At least 70% of spermatozoa should have normal mobility in female genital paths. However, to move purposefully spermatozoa begin only by being in the sex of the woman, beyond which they are generally not characterized by directional movements.
Medical analysis of the composition of sperm is called spermogram. Quantitative indicators of spermograms are very important in the diagnosis and treatment of male infertility, since, although the egg fertilizes one spermatozoa, the decrease in their concentration in sperm significantly reduces the likelihood of this event. The volume of ejaculate and the amount of spermatozoa in it is very sensitive to the action of all sorts of malicious influences: deterioration of environmental conditions, smoking, alcoholism, drug addiction. For the last substalline, the average concentration of spermatozoa in the seed fluid of healthy men has dropped twice. Once in the genital paths of a woman, men's sexes remain ready for fertilization on average two-three days.
A woman has an egg formation most often takes from 17 to 40 years. The cycle of the development of spermatozoa is significantly shorter - only 68-74 days. And in women, and men, sex cells, ripening, leave the places of their formation (sex glands) and in sexual tracks are sent to the meeting place and fertilization. Sex cells of men and women are completely unlike in their structure, and in the process of fertilization, they are in fact opposite, although complementary roles. However, the volume of hereditary material (the number of chromosomes in the nucleus) and in the female, and in the male genital cell is exactly half of the chromosomal set of any other cell cell. When merging the genital cells, their kernels are combined, and the new organism gets a complete set of chromosomes.
Mother cell - the egg cell is one of the largest cells of the body. It carries the supply of nutrients in the form of a yolk (containing proteins, fats and carbohydrates), which is enough germin to the first 3-4 days of very intense life. The female sex cell itself is not capable of moving.
Sperm less than an egg cell, its distinctive property - mobility. It can be said that it is core cells with chromosomes, which has one "paddle" - a flavor. Many cells of the human body are moving at considerable distances, but only a spermatozoa owns such a perfect "engine", allowing him to first leave the body of his owner, and then head to the sex of the woman to the place of meeting with the egg.
The movement speed of human sperm cells is estimated at 30-50 μm / s (recall: one micrometer, or micron, is one million meter). Actually a flagellum is used for targeted movements on the last segment of the path: in the uterine pipe and in the process of fertilization, the fusion of the genital cells occurs in a certain part of the uterine tube, in its ampoule. The egg cell is transferred to just a few centimeters, while the sperm overcomes the considerable distance first on the seed-handing paths of a man, then a woman's sexual paths.
Initially, 2-3 ml of seed fluid is injected into the vagina. Under optimal conditions 30-60 minutes after the semiages of the spermatozoa fall into the uterine cavity, and after 1.5-2 hours - in the ampoule of the uterine tube. With fertilization, the female sex cell highlights substances that "attracting" sperm and the exact position indicate it. One egg cell "find" simultaneously many spermatozoa. They are attached to her shell and the movement of their flagellations lead an egg in a rotational movement. Thus the shell of the egg, spermatozoa, then dissolve its special substances.
After one spermatozoa manages to penetrate the eggs, for the rest, its shell becomes impenetrable. The core of the sperm and eggs merge, the father's chromosomes form a single set with mother chromosomes.
Counting of pregnancy begins from the first day of the last month. But neither doctors nor a woman herself can determine an interesting position at this stage. During this period, only the preparation for the fertilization of the egg, and this process flows imperceptibly.
Pregnancy flow - a fascinating process associated with the development of the fetus for weeks. Consider what is happening with the mother's body during the baby tooling, how the changes associated with the increasing embryo, which sensations are accompanied by each stage of pregnancy.
Embryo doctors call a valid period, leading countdown from the date when a new life was conceived. As a rule, this is a day in which a woman had ovulation. In medical practice, an obstetric period is more often applied. His countdown is conducted, starting from the first day of the last month. It is fourteen days more than the embryonic. In medical practice, it is customary counting of pregnancy for obstetric weeks
Experts allocate a number of critical stages during the tooling of a woman of a child. In these periods, the sensitivity of the embryo to the action of damaging factors is highest. And this threatens the likelihood of abortion.
Most often, the occurrence of critical periods occurs in those time segments when the growth and development of the fetus with the placenta is activated. At this time, the degenerate effect of outside can harm the baby or even kill him.
Many dangerous periods are observed in the 1st trimester, when the fruit egg is introduced into the uterus, and the process of laying organs and systems of the baby begins. The smaller the term of pregnancy, the more it is susceptible to the harmful effects of adverse factors.
Pregnancy for weeks: the development of a new life step by step from the first hours before the appearance of the baby on the light. How to find out what changes occur in the body every seven days? We tell about the pregnancy for weeks, the development of the fetus with the most important events and well-being Mom in our digest on MedaboutMe.
Although pregnancy for weeks, the development of the gestation process takes not 9 months, but an average of 38 weeks, but it is believed that it lasts 40 weeks. This is the term of obstetric pregnancy, which begins, oddly enough, on the first day of menstruation before conception. From this week and let's start our story.
Pregnancy for weeks is your pregnancy guide with a photo of a week for a week. What happens to the fruit and the future mother from the moment of fertilization and signs of pregnancy in the first days until the 40th week. How the weight of the child and the future mother changes through the weeks of pregnancy.
Pregnancy - the most worrying period in the life of a woman, when every day she wants to get a maximum of information about how new life develops inside it. And this is a fairly rapid pace, in 280 days of several cells develops a small man. Each week of pregnancy has a future child improved and systems, it acquires new skills and skills.
Certainly, the future mother at an intuitive level feels as evolving and how the baby feels in her stomach. And for a clearer picture, it is still necessary to have a brief idea of the intrauterine development of the baby on weeks:
1-4 week - pregnancy is usually coming on the 14th day of the menstrual cycle, after fertilization, the egg is attached to the wall of the uterus, the formation of the nervous system, the brain and the heart of the kid occurs. The spine and muscles are formed. For 4 weeks the length of the embryo reaches 2-3 mm, you can already determine the legs, handles, ears and baby's eyes.
5-8 week - during this period, women discover that pregnant and make a confirmation test. For 6 weeks on the ultrasound, you can see 5 fingers on the hand of the child and distinguish its careful movement. His heart is already beating, but with a frequency greater than 2 times the rhythm of heart blows mom. For 7-8 weeks, the face of the child is drawn up, its bone system begins to develop. The weight of it reaches 4 grams, an increase of about 3 cm. In this period of pregnancy, many women begins to be sick in the morning.
9-12 weeks - the baby can already bend fingers on her hands, he now knows how to express his emotions: pushed, wrinkles forehead and swallows. The content of hormones in the blood of a pregnant woman during this period increases sharply, which affects the mood and well-being of a woman. At 11 weeks, the kid reacts to noise, heat and light. He feels touch and pain. At 12 weeks, according to the results of the ultrasound, the doctor can accurately determine the delivery time and evaluate whether there are deviations in the development of the baby. A three-month baby in mom's womb is very active, it is easily repelled from the wall of the uterus, sucks a big finger and reacts to external stimuli. It weighs 28 grams already, and he has about 6 cm height
13-16 weeks - the child is formed by genitals, the pancreas begins to produce. His heart is already pumped 24 liters of blood per day. There is a hair on the baby's head, he can already open his mouth and grimace. During this period, Mom must try to control their emotions and remain calm in any situations. Everything that she feels is already transmitted to the baby. If she is bad, the fucking is too frustrated.
17-20 weeks is a particularly worrying period for the future mother, for for the 18 -20 week she begins to feel like a child moves. By this time, the length of the kindergosts is 21 cm, its weight is 200 gr. He already hears the noise and sees a little. In this period lasting every day talking to the baby and sing him songs. He is already heard of Mom and calms down when it's all right. The belly of a pregnant woman for 20 weeks becomes noticeable.
21-24 weeks - the baby at this age is able to combine his mouth and begins to carefully study his body. He touches his face, head and legs with his hands. But it looks still wrinkled and red due to the lack of subcutaneous fat stupor. The weight of the baby is about 0.5 kg, the height is 30 cm. He no longer likes when the mother sits for a long time in the same position. He becomes hard to make her climb from the scene. From this time, mom should be followed by their diet, eat well and walk more in the fresh air.
25-28 weeks - a child born during this period has real chances to survive. He has eyes already open, there are eyelashes, it compresses and squeezes the handles. It weighs by 28 weeks about 1 kg and very rejoices when the dad strokes the belly of mom. He likes to listen to music and a calm conversation of his parents.
Pregnancy trimesters - a way to divide the period of bearing on comfortable and understandable periods. What do they mean? How many weeks and months do each trimester lasts? What features are the first, second and third trimesters? What is happening at this time, what are your risks and what are the recommendations?
Pregnancy for weeks with photos and videos in a detailed pregnancy calendar Starting with 1 week of pregnancy and 42 weeks
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