At the end of this article, we have a pregnancy calculator so you can calculate the time of pregnancy, when it will be the probable date of birth and estimate what was the day when conception occurred. But before we will explain all about the ways to calculate gestational age. It is common knowledge that a pregnancy lasts an average of 9 months. However, as soon as the pregnant woman goes attend prenatal visits she learns that her obstetrician does not count the time of pregnancy in months but in weeks. For those who are not accustomed to this way of counting gestational age everything seems more complicated. Would not it be easier if the doctor say that she is in the fourth month of pregnancy?
In fact, doctors do not have time agreed pregnancy weeks only to confuse the head of pregnant future. There is logic behind this decision. Changes in the body of the woman and fetus are many and occur relatively rapidly, especially in the first half of pregnancy. In one month, take place dozens of major changes, and counting in weeks allows us to define more precisely the time of each. For example, (fertilized egg) is implanted in the uterus wall during the 3rd week, the heart is formed on the 4th, the embryo becomes visible in the ultrasound on the 5th, the eyes appear on the 6th and the future baby starts moving in the 7th week (the mother does not notice because it is too small). If we gestation in months, we would not be as accurate instantly assess the time of such changes. [Read more…] about Pregnancy calculator figuring week of pregnancy