How to calculate the duration of pregnancy before going to the doctor?

The term of pregnancy is the first thing that interests future parents. As is known, rarely a woman has a stable menstrual cycle in 28 days and ovulation for 10-14 days. As a result, pregnancy can occur immediately before the beginning of the next cycle or in the first days of the previous one. In some cases, pregnancy is diagnosed only for the second month, if there are failures with the cycle (or there were minor discharges taken for menstruation).

How to calculate the duration of pregnancy and the estimated date of birth?

The surest way is to go to a gynecologist or an ultrasound specialist. It is better to choose the second option, because you will know exactly what pregnancy is the uterine, at what time you are, and whether there is a threat of interruption.

So, how to calculate the duration of pregnancy.

Definition by date of conception and ovulation

This method is suitable only if you know the exact date of conception. In this case, calculate your time will not be difficult. But, as we said above, ovulation can occur and not on the 14th day of the cycle.
If you follow the rules, in the case of 35 days of the cycle, ovulation occurs on the 17-18th day, but there are always exceptions. It is not uncommon for pregnancy to occur in "safe days", that is before or after ovulation. Determine these few days can be done at home using tests or by regular measurement of basal temperature (a schedule for several months will be required). During ovulation, the temperature rises to about 37-37.2.

Date of last menstruation

In this case, everything is extremely simple and many doctors, when asked about how to calculate the duration of pregnancy, offer this option. This method is also called obstetric. You start counting the weeks from the first day of the last menstruation. By this method, you can answer the question and how to calculate the date of birth of the child. The 40th week is the date of the intended delivery. But remember that each case is individual. And the baby can appear on the light as on 38, and on 42 week, and after all it is a difference in a month!

Examination at the gynecologist

The best way to calculate the duration of pregnancy is to contact a gynecologist. You will either be examined in an armchair or sent to an ultrasound. So you will know exactly what week of pregnancy at the moment.

Note that it is not necessary to go to the doctor directly on the first days of delay or even after one week. The fact is that at a small time (up to 4 weeks) it is difficult to determine the pregnancy. To avoid unnecessary emotions, it is worth waiting a little.

Ultrasonography

The most accurate way to answer the question of how to calculate the length of pregnancy by weeks. The first planned ultrasound is performed at week 12, when, in addition to confirming the presence of the embryo, many indicators are checked. But this survey is often required earlier to determine the course of pregnancy.
In the future, you may be given a slightly different term for ultrasound, because each child develops differently. Often doctors put a delay in the development of the baby, when in reality this is not. The established norm of weight in 3-3,5 kg can even "demand" from mum, not considering its body build. But babies, born with a weight of 2.8 kg and 4 kg, are developed absolutely equally (that is - without any deviations).