Many pregnant women can not calculate the expected date of birth, because they do not know when their last menstrual period is, and they are not aware of the date of the fertilization.
The date of birth can be defined in the following ways:
- Depending on the date of the last menstrual cycle passed by the woman, it is normal for the pregnancy to be calculated from the first day of fertilization, since most women are ignorant of this day. Therefore, the specialists use the pregnancy and childbirth calculator to calculate the last menstrual cycle. ) To know the expected date of birth, so it is important to remember the last cycle to be accurate calculation, the normal pregnancy period is nine months and two weeks, equivalent to (approximately forty-two weeks)
- Know the date of birth by the sonar: Because many women do not remember when the last menstrual cycle or that the menstrual cycle is irregular, and away from the calculations resort specialists in this case to sonar, which is the preparation of ultrasound known through which all the developments that occur to the mother since the first week of pregnancy, The doctor measures the length of the fetus from the head to the feet, and the circumference of the head, and the weight, and this is about 10 weeks of pregnancy. , With the addition of six additional days which are the days that are Wen where a strong chance of pregnancy and can not determine the appropriate day that fertilization occurred accurately.
Because the pregnancy at the beginning is not only a point within the uterus pulses strongly this is what the fetus before the tenth week so calculations are pregnancy as follows:
- First week of pregnancy ………… .. The duration of pregnancy is nothing.
- Second week of pregnancy … .. The duration of pregnancy week.
- Third week of pregnancy ………… The pregnancy period is two weeks.
- The fourth week of pregnancy … .. The pregnancy period is three weeks. So until the end of pregnancy.
It is possible for a mother to give birth to her baby before the week of Monday and 40 shortly, and some exceed the period to be maintained by the doctor concerned to learn the stages of development and development of the fetus naturally and reassurance on the health of the mother.