How to calculate the gestational age for weeks with a description? Methods for determining the date of conception

Almost every woman wants to have a baby sooner or later. And this process from the very conception requires some preparation. It will also be useful to know how to calculate the gestational age for weeks. We will try to review the description of this process below. Practice shows that it is easy for a woman to do this without problems with menstruation. True, sometimes you have to try not to make a mistake. An attentive woman will never miss the moment of conception. And this is the basic information that helps to find out whether fertilization has taken place, as well as how long the fetus is already developing.

About Conception

Before calculating the gestational age for women in weeks and not only, you need to understand how conception occurs. This information will help every expectant mother to understand the circumstances under which to watch out.

Favorable time for conception




Conception occurs by fertilizing a mature egg with a sperm that leaves the follicle. Most likely to have a pregnancy is ovulation. It occurs approximately on the fourteenth day of the cycle. Or rather, in the middle of it.

However, even if a woman did not have unprotected sex during ovulation, she can still become pregnant. Sperm can remain motile for about a week. This means that unprotected sexual intercourse about a week before and 2-3 days after ovulation can lead to a successful conception. But how can you calculate the gestational age? We will review the description of this operation below. All the methods proposed below for obtaining the necessary data are effective and highly reliable. But mistakes are still possible.





Different terms

It is also worth paying attention to the fact that the term of an “interesting position” varies among doctors. At the moment, the girl can be informed of the obstetric and fetal gestational age. Only it’s not entirely clear what you have to deal with.

The obstetric gestation period is counted from the beginning of the last critical days, and the embryonic period begins immediately from conception. Moreover, the second is two weeks less than the first. This is a normal occurrence.

Ways to solve the problem

How to calculate the gestational age? You can calculate it by weeks if you know exactly when the conception occurred. Further from the current date, you just need to take the day of conception. The received term - this is the period of development of pregnancy. That is why we will focus directly on determining the first day of conception of the baby.

At the moment, you can achieve the desired result for a woman:

  • using a special test;
  • calendar method;
  • using a basal temperature graph;
  • using special online calculators;
  • by contacting a gynecologist;
  • by visiting the ultrasound room.

In reality, everything is simpler than it seems. Especially if you prepare in advance and carefully monitor the body. Next, we consider all the existing scenarios.

Calendar method

How to find out the gestational age by week? You can calculate the date of conception and the current time of development of the fetus in a calendar way. It is perfect for women with a regular cycle.

Calendar method for determining conception




To use it, it is recommended to perform the following actions:





  1. Determine the day of ovulation. This is about the middle of the cycle. Ideally, use to determine ovulation by ultrasound and special tests for home use.
  2. Recall when there were last critical days and unprotected sexual intercourse.
  3. Subtract the date of conception from the current date, as well as the day when the last menstruation began.

In the course of the described actions, a woman will immediately calculate both the fetal and obstetric gestational age, respectively. The main thing is to remember that sexual intercourse more than a week before ovulation, as a rule, does not lead to an “interesting situation”.

Pregnancy tests

How to accurately calculate the gestational age by week? This is far from the most difficult task. Especially if a woman has a regular menstrual cycle.

To achieve the desired result, you can purchase an electronic pregnancy test. Such a device often allows not only to judge the success of conception, but also shows how long the girl became pregnant. More precisely, the obstetric term of an "interesting position."

Pregnancy test to determine its duration




In order to obtain the necessary data by the selected method, you will need to do the following:

  1. Get an electronic pregnancy test showing your gestational age. For example, Clearblue.
  2. Wait for delayed menstruation. Up to this point, the results will be unreliable.
  3. Substitute the test under the stream of morning urine. You can also collect the biomaterial in a sterile container, and then lower one end of the dough into it.
  4. Hold the receiver in urine for 5 seconds.
  5. Lay the device on a flat, dry surface. Sometimes this is not necessary.

After the actions taken, the woman will see if she is pregnant. If so, the electronic test will show not only a successful conception, but also the term of the "interesting position" in weeks.

Important: you can purchase a similar test in pharmacies and even on the Internet.

Temperature graph

Calculating the gestational age for weeks is not as difficult as it might seem at first. With this task, as already mentioned, every woman will cope. The main thing is to figure out how to act under certain circumstances.

To determine the date of conception, you can build a so-called basal temperature graph. True, this technique helps to obtain reliable information only to those ladies who keep a BT schedule for several menstrual cycles.

Instructions for achieving the appropriate goal are as follows:

  1. Take basal temperature measurements daily and record them in a special calendar. It is also advisable to put point marks on the chart.
  2. Build a BT schedule.
  3. Look at the data received. During ovulation, BT increases. It can reach 37.5 degrees Celsius. If conception has not taken place, everything is slowly returning to normal. Otherwise, the temperature will remain elevated.

Once the date of conception is known, you can easily calculate the gestational age by weeks after IVF and not only. Practice shows that all this is extremely simple and understandable. Even a teenager can achieve the desired result. The main thing is to carefully treat your body.

If a woman did not initially maintain a BT schedule or has irregular critical days, it is better to abandon this approach. It will give false results.

BT schedule




Online calculators

You can calculate the gestational age of twins by weeks (or by one baby) automatically. Or rather, through special web services. They are called calculators. In our case, with pregnancy calculators. Typically, these services are located on various women's websites of an informational nature. Work around the clock and absolutely free.

Want to calculate your gestational age by weeks? We have already reviewed the description of several ways of calculating the relevant information. To use this calculator online calculator, you will need:

  1. Find a pregnancy calculator. For example, on sites "Baby.ru" or "Babyblog."
  2. Indicate the duration of the menstrual cycle.
  3. Set the date of the last menstruation in the specially designated windows of the electronic form. It implies its beginning.
  4. Press the button responsible for starting the necessary calculations.

Fast, easy and very convenient! Now it remains to wait a bit - the system will process the form that appears on the screen. After waiting a couple of seconds, the user will see information on the date of conception on the screen.

What's next? Some calculators immediately show how much and for which dates pregnancy is. If this information is not available, the woman should simply determine the difference between the current date and the time of successful fertilization of the egg. Elementary mathematical operations and nothing more!

Calculation of the term and date of pregnancy online




By DA

How to calculate the gestational age by weeks? Calculate the date of conception, and then determine the difference between the current date and the time of successful fertilization of the egg. This, as practice shows, is not so difficult. It is enough to know math at the school level.

A non-standard way of obtaining information of interest to a woman is to determine the date of conception by DA. At the same time, the "interesting situation" remains for nine months. Take a situation without pathologies. They need to be "rewound" from the estimated date of birth.

What's next? If you want to determine what is the current gestational age, a woman should simply calculate how many weeks and days have passed since the fertilization of the egg to this day. Everything, as one could notice, is extremely simple and clear. True, such a solution is not in great demand.

Gynecological calendar

How to accurately calculate the gestational age by week? If there is a suspicion that the girl has an "interesting position", the woman will have to hurry up and consult a doctor. It is worth signing up to the gynecologist.

This specialist, using his gynecological calendar, will calculate the time of development of the fetus and report PDR. Very comfortably! All you need to tell your gynecologist is the first day of the last before the potential conception of the menstrual cycle.

The doctor will put the named date on his calendar, and he will show exactly when the conception took place, as well as the period of development of the fetus at the time of the girl's visit to the gynecologist. Also, as we have said. with the help of this calendar it will be possible to understand exactly when to wait for replenishment in the family.

Gynecological calendar




Important: before a visit to the gynecologist, it is also recommended to do a blood test for the "human hormone". It increases rapidly during pregnancy. It is possible that the delay in menstruation is caused by some kind of hormonal malfunction, and not by the successful conception of the baby.

Ultrasound to help

To calculate the gestational age for women in weeks, you often have to seek the help of specialist doctors. Not a single independent technique presented to attention earlier gives reliable results. All of them can be mistaken, since the female body, under the influence of external factors, diseases and hormones, can shift the menstrual cycle and ovulation. This is a lot of trouble when determining the time of conception of the baby.

So that you don’t have to think about how you can calculate the gestational age by weeks (we have already managed to get acquainted with the description of some methods for obtaining the relevant information), you just need to do a special test at home (you can also go to the clinic for it) and then go to the doctor’s office Ultrasound

Only by examining the pelvic organs through ultrasound will it be possible to understand whether there is a pregnancy. And if so, what is his term at the time of the patient's request for the appropriate service.

As a rule, a visit to an ultrasound room too early is ineffective - the fetus may be confused with a tumor or an inflammatory process. At about 6 weeks of “interesting position”, the future baby has a heartbeat. And already at this time you can accurately understand whether the pregnancy really takes place, as well as what is its duration.

Need to calculate the gestational age? How many weeks does the fetus develop? Then each girl should choose a method for diagnosing an "interesting situation." With this information, as we have already said, obtaining data on the current "stage of development" of the fetus will not be difficult. Ultrasound gestation is not difficult to calculate by week.

Important: a specialist in an ultrasound room must definitely clarify exactly what period of "interesting position" he is talking about. Then it will not be difficult to even understand when to go on maternity leave at work. And to find out before the visit to the gynecologist the day when a woman will have to give birth "according to plan."

Negele formula and its help

But that's not all! In order not to get confused, a woman can use a special pregnancy calendar for weeks. To calculate the period of maternity leave at work, information on how many children the girl will give birth will help. Typically, the decree goes to the 30th week of the "interesting situation", and after it they are on leave to take care of the newborn.

In any case, you need to understand how to correctly calculate the gestational age at the current moment. For example, through the Negele formula. It helps to achieve the desired result before a visit to the gynecologist. To cope with the task in this way, you need:

  1. Find out when was the first day of the last critical days.
  2. Subtract 90 days from the received date.
  3. Add a week. It will turn out the moment when a woman should give birth. Of course, with a normally developing pregnancy.
  4. Subtract 280 days from the DA. In this case, it will be possible to find out when the conception occurred.
  5. Calculate the difference in weeks and days between the current date and the day when the baby was conceived.

Done! This method is usually used by gynecologists to calculate PDR. The last 2 steps of the proposed guide help women at home to find out what is the period of development of an “interesting situation”.

See a doctor




Instead of a conclusion

We found out how you can calculate the gestational age by weeks. A description of the possible methods for obtaining information was made possible to familiarize with as much as possible. Practice shows that everything is extremely simple. A little attention to your own body - and the job is done!

Which method is better to use? Electronic tests and ultrasound examination by a doctor in the office. If you suspect a pregnancy, consult a gynecologist. But the BT schedule and the calendar method of calculating the term of "interesting position" can fail.




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