When does the trimester of pregnancy begin? From what week of pregnancy does the third trimester start?

A lot of people are interested in what weeks of pregnancy the third trimester starts. This is important to know, especially when you consider that this period in itself is very important for a future mother. The third trimester is the final feature, which brings a lot of surprises, troubles, and sometimes problems. The baby is about to appear! There are very few left.

From what week does the trimester start? What did he prepare the future mother for? Why should she prepare? All this can be found further. After all, managing pregnancy is a very important process, especially at the very end and the beginning.

Uncertainty

In general, anyone who has ever come across an "interesting position", is aware of some bewilderment of future young mothers who have just registered and are trying to determine what they are on the week. The thing is that there are two variants of the development of events. Which ones?

Interested in what week of pregnancy begins the third trimester? Then remember: your data and doctor's testimony will differ. For about 2 weeks. After all, there is a so-called obstetric term and an embryonic period. They affect the testimony. So, they will not coincide. To answer, from what week of pregnancy begins 3 trimester, because of this it is difficult. But probably.

Obstetric

Most often, in order not to confuse or frighten a woman, it is customary to consider both options. The first step is to pay attention to the obstetric period. It is extremely important for setting up a DA (an approximate date when you will have to give birth). Of course, it is in the third trimester that it will take place.

The obstetric indicator depends on your months. It is counted from the beginning of the last critical days. If you believe this indicator, then you can answer the question of what week comes the third trimester of pregnancy, independently, without testimony and conclusions of the doctor. What will be the answer? The third trimester is, as can be easily guessed, 27 weeks. It is from this period you go to the finish line with such a long and important process.

Embryonic

But not everything is as simple as it seems at first glance. It has already been said - there are two options for calculating the gestational age. In the first case, obstetric, you can do without the help of doctors and determine everything yourself. But in the second, embryonic, only examination of the gynecologist, as well as the conclusion of ultrasound will give you the result. And accurate.

So, for example, be prepared for the mismatch between obstetric and embryonic gestation. This is a normal phenomenon, it never happens that they coincide. In practice, the second indicator exceeds the first by approximately 2 weeks. After all, as a rule, conception occurs on the day of ovulation (from here begins the count of embryo development). It happens closer to the middle of the cycle, on average after 14 days.

From what week of pregnancy does the trimester begin in this case? Only your doctor will tell you, who observes the difference between the obstetric and embryonic period. But if you take the conventional indicators in 2 weeks, then 25 (relative to the first day of the last menstruation) is already beginning the final stage of development of your baby. But the immediate beginning of the third trimester for mother remains the same - from 27 weeks.

Attention, childbirth

So we decided on when you can call pregnancy almost completed. Only now is it worthwhile to understand the features of this period of time. There are a lot of them, much more than at the very beginning of the way of bearing the fetus.

The third trimester of pregnancy from which week begins? As it turned out: with obstetric terms - from 27 weeks from the day of the last menstruation, and when embryonic - from about 25. Nothing difficult in this. Orientation will be more on the first indicator, it is on him that both women and doctors are leveled.

It's all about the fact that at the beginning of the third trimester you can begin to give birth! Approximately 28 weeks of gestation. This phenomenon is called spontaneous miscarriage or a similar generic process, premature. If the child develops normally, you do not bother, you should not panic much. The kid will be born in a natural way, just until a certain moment he will be in intensive care unit, connected to special devices that will help the newborn to leave, not yet fully formed. Quite a rare phenomenon, but it happens. Usually your doctor warns about the risk of premature birth.

Race

We have already figured out from what week the third trimester of pregnancy comes. Moreover, already at the beginning of this period, you can face such a phenomenon as childbirth. But, as has already been noted, this happens not so often. Therefore, it is worthwhile to consider a typical situation in which the future mother is equal to the PDR.

A huge headache for women is the third trimester of pregnancy. Why? From 27-28 weeks and up to 30 inclusive (and this is about a month) you will be chased by doctors. Regular examinations and tests! One surrendered urine is indispensable.

The third trimester is memorized for many people by running around the doctors. First, you need to donate blood to many hormones. Not too critical, but sometimes unpleasant. Secondly, gynecological smears according to the indications. Third, the passage of narrow specialists. This moment is able to dislodge even the quietest pregnant woman. Very often it is the narrow specialists (for example, the therapist) who begin to raise excess panic around the woman in the position, prescribe many additional tests and studies, because of which the future woman in labor is unable to sign the exchange card at the hospital and conclude a contract. But this is inevitable, you will have to be patient. When the tests are done and the doctors have passed, you will finally be given recommendations on delivery.

Months

We have already found out which weeks of pregnancy the third trimester starts. Or with 27, or with 25. It all depends on what kind of term you meant - obstetric or fetal. But now there is one more question that some people worry about quite seriously: "And how many months?"

It is easy to guess (and even count) that the third trimester begins with the 7th month of pregnancy. And it lasts for 9 inclusive. Therefore, many consider the periods of the current "interesting situation" not in weeks, but in months. This is much easier than specifying obstetric and embryonic periods.

From now on, we know when the third trimester of pregnancy begins. Moreover, it is now clear to what you can morally set yourself up and cook, especially if you do not like too much to take tests and go to doctors.

The final stage

What else can be said about the features that await the expectant mother in the specified period? For example, do not forget that normal for the development of the fetus, but not exactly suitable for the mother and the doctors are not excluded. Also premature, but resuscitation is no longer needed.

The thing is that it is important to know from what period the third trimester of pregnancy begins, because of the probability of childbirth during this period. The other question is when they start. Completely premature and dangerous, equivalent to miscarriage, occur at week 28, but just premature babies are born at 36. This is normal.

Nevertheless, doctors believe that the body is fully ready for procreation by the 38th obstetric week. And such births are normal. As practice shows, from 38 to 40 weeks they will necessarily take place. Otherwise, it is necessary to wait for the expiration of the full embryonic period. This is not the most frequent phenomenon, but it happens. Now it is clear, from what week of pregnancy begins the third trimester. Be ready for this period! Start collecting bags in the hospital!