Pregnancy Symptoms and Signs

Calculation of age early in pregnancy since the first day of menstruation ends because most women do not know exactly when they ovulate, but most know when her menstrual period ends. Generally, doctors will count for 280 days gestation to determine the due date or birth of the baby. The amount is equivalent to 40 weeks gestation. But that date estimates only, and only 5 percent of babies are born exactly on the date of such estimates. As for the trimester is often regarded as the third month of gestation. Someone will be said to be in the second trimester after 14 weeks pregnant and third trimester when the pregnancy reaches 28 weeks. Usually prefer to call someone in the month of her pregnancy, in this case is not appropriate to count one month equals 4 weeks. Therefore taken an average of one month for 30 days and 1 week of 7 days. Gestational age and generally are not exactly 9 months, for example if the first day he last menstrual period is January 1, then the maturity date is October 8. So the calculation is like 9 months 1 week or 10 days, but she could give birth before or after that date.