The process of the birth of a new life can only be compared with magic. Similar transformations Woman feels only in a special period. Not only her body, feelings, but also awareness of the whole world change. Together with the child, the future mother passes a huge stage from the emergence of one cell, before the birth of the new inhabitant of the planet.
Pregnancy for weeks The development of the fetus and the sensation of women will make it possible to understand the changes that occur on the physiological and psychological level. The entire period will last 40 weeks, or 10 lunar months, in each of which for 28 days (full cycle).
Under the first week of obstetric periods, it is customary to consider the last day of menstruation. During this period, conception does not necessarily happen, it can happen after 2 or 3 weeks, depending on the time of ovulation. You can only learn about the onset of the long-awaited state only by measurements of basal temperature. At this time, home tests do blood testing on HCG will not show a true result. There are no obvious signs, the woman is still active, in the body only pass preparatory stages.
The fusion of the egg and spermatozoa occurs in the phallopyan pipe. As soon as fertilization occurred, one main cell is formed - the zygote. It is she who the basis of all systems and organs that will be laid and form for 9 months. The first rapid chemical reactions begin, the reinforced synthesis of special hormones hCG is observed for 5-6 days. This will reduce the immune protection of the parent organism, to preserve the embryo.
The sensations of a woman do not differ, it leads the usual way of life, physiological changes come a little later. But some, moms, with very developed intuition and sensitivity, can determine the exact occurrence of conception without tests and analyzes.
ovulation time falls on the middle of the cycle, if it consists of 28 days, it means that the egg cell ripening occurs on 14 days. If the conception has not happened, then after 2 weeks, the unfortunate female cell is displayed during menstruation.
Calculate the moment of ovulation can be used by special pharmacy tests, or measurements of basal temperature!
distinguish an obstetric (gestational) and ovulation (fertilization) term of pregnancy. The first is complete, less accurate and easy to calculate. The second is the actual, most accurate, but it is more difficult to calculate it.
ovulation - the exit of the egg from the ovary. After leaving the ovary, the egg cell is fertilized or not fertilized in the uterine tube.
Neoploditant eggs are output from the body with menstruation. If the egg fertilizers, after ovulation, it will pass the path to the uterus and will fix it in it.
So in practice, it is difficult to calculate, in addition, it can be changed by the current emotional and physical condition of the woman, the activity of sperm, it is customary to take into account all the days after the onset of the last menstruation as the days of probable pregnancy.
In practice, there were cases when the pair neglected the protection means per day before menstruation, hoping that the pregnancy would not come and everything would be released with the monthly. As a result, the nearest planned monthly passed, but did not occur.
The duration of pregnancy in women from doctors is customary to count on weeks, not for months. How to calculate how many obstetric weeks have a pregnancy?
When registering for pregnancy, the gynecologist determines pregnancy: it turns out the date of the beginning of the last menstruation, and from it until the meeting with the doctor counts the weeks. It turns out a current period, but it is not absolutely accurate. In fact, on the day of the start of menstruation, a woman cannot be in position, but instead of trying to calculate the real day of fertilization, which is extremely difficult, it is customary to take into account the extreme date of the likely fertilization.
ovulation period is counted from the date of ovulation. Calendar is taken with marked launch days in the last six months. It is believed that ovulation occurs 14 days before the start of menstruation or in the interval from 13 to 15 days of the menstrual cycle. By the marks in the calendar, for at least 6 months, it is necessary to check the regularity of menstruation and calculate their day of ovulation. From the date of the last ovulation, count the weeks, and here it is a ovulation period.
Later, the deadline is confirmed or refuted in 11-12 obstetric weeks. At this stage of development, the fruit has certain external features that are characteristic of a specific period of pregnancy. Uzi clearly shows the state of development of the embryo and makes it possible to put a more accurate period.
Not an easy pregnancy period Most women subsequently remember both the happiest time, a light length of time filled with amazing feelings and fascinating discoveries. In the world it is difficult to find a woman who would not want to survive these sensations again. They are firmly cut into memory. What is the service life of the baby and how much it lasts actually, we will tell in this article.
Pregnancy from the day of conception until the day of birth can have a different duration. A day that is determined as an alleged day of birth is only an approximate reference point that allows the doctors and the most future mother not to get confused in terms.
In obstetrics, it is customary to calculate the duration of pregnancy according to the rules of the Nechal. It states that pregnancy lasts exactly 280 days from the start of the cycle. In other words, the countdown begins on the first day of the last menstruation, which occurred before the occurrence of pregnancy.
As you know, conception is most likely on the day of ovulation or within a day after it. Ovulation falls on the middle of the cycle, and therefore from conception to childbirth on average runs 38 weeks or 266 days.
Calculating pregnancy accepted by obstetric months, which differ from the month of the calendar, habitual to the majority of people. In the calendar month, it can take 30 days, and 31 days, the shortest month - February - usually he has 28, and in the leap years - 29 days. An obstetric month - exactly 4 weeks, regardless of how it is called in the calendar.
Thus, 9 months of pregnancy in folk calculus are 10 obstetric months, or exactly 40 weeks from the date of the last menstruation, or 38 weeks from the date of conception.
This time is divided into three main periods, each of which is called trimester. The first trimester is the time from the start of pregnancy to 13 weeks. During this period, the most important processes occur - the bookmark of organs and systems of the kid, their formation. The second trimester is the period from 14 to 27 week, during this period the kid is intensively growing, the interaction in the work of all its organs is debugged. During the third trimester from 28 to 40 week, the baby is gaining a mass and is preparing for the emergence of light.
Pregnancy - the physiological process flowing in the body of a woman during the beating of the fetus and ending with the birth of a child.
Pregnancy is formed as a result of the merger of the sperm (male genital cell) and egg cells (female genital cell).
The term of pregnancy is the main criterion by which the correctness of the development of the baby in the Mom's womb is determined.
Since it is not always possible to establish an accurate date of conception in obstetrics It is customary to read the term of pregnancy from the beginning of the last menstruation - obstetric period.
on obstetric term physiological (normal) pregnancy lasts an average of 9 calendar months, 10 lunar months (in the lunar month - 28 days), 40 weeks or 280 days.
Given that the usual duration of the menstrual cycle of a woman is 28 days, and the ovulation of the ripe eggs occurs on 13-14 days, the fertilization can occur in 2 weeks from the start of menstruation. This will be considered an embryonic gestation. Thus, the embryonic term is less than obstetrics for 2 weeks and lasts about 38 weeks. Such calculations are true only for women with a stable cycle and lack of hormonal disorders, in other cases the deviation of the deadlines is possible both towards the increase and decrease.
According to the statistics of discrepancies between obstetric and embryonic period, 20% of women make up less than 2 weeks, in 45% - 2-3 weeks, in 15% more than 3 weeks.
Signs of pregnancy is customary to divide for dubious (supposed), probable and reliable. Doubtful signs of pregnancy are based on subjective data (sensations of the woman itself). These features are characteristic of pregnancy, but different women can be expressed to a greater or lesser extent, and may not be absent. These signs may also be symptoms of another condition or disease, that is, are not specific (characteristic only for pregnancy). Doubtful features of pregnancy include:
Probable signs of pregnancy are more specific (characteristic of pregnancy), are detected with an objective inspection (examination of the patient by a doctor). The presence of probable signs in the absence of pregnancy indicates serious violations in the genital system of women (diseases). Probable signs of pregnancy are:
Significant signs of pregnancy are evidence of embryo (fetus) in the uterus. These are:
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