How to determine the gestational age

 You can determine the gestational age at the date of ovulation and conception. Ovulation is the period of the menstrual cycle, during which may occur conceiving a child. This period occurs in women in the middle of the menstrual cycle (every month). If the 35-day menstrual cycle, ovulation occurs on day 17-18 of the cycle. If the menstrual cycle is 28 days, ovulation occurs around the 14th day. The term of pregnancy starts from the day of ovulation.

The easiest way to determine gestational age - is the application of the formula Negele. The method used to determine the time of childbirth. To find out period is needed from the first day of your last period and subtract three months to add seven days. Based on the due date, you can calculate the duration of pregnancy.

Determine the period of pregnancy, you can use a pelvic exam. Gynecologist determines gestational age based on the size of the uterus. For example, a 4 week pregnant uterus size comparable with chicken egg. In addition, an experienced gynecologist can easily set the duration of pregnancy up to date as a result of vaginal examination. At the same time, the gestational age 8-13 weeks later set based on the size of the uterus is difficult, due to the fact that starting from the second trimester of pregnancy in women who are at the same period the size of the uterus may be substantially different.

You can determine the gestational age at the first stirring of the future child. Nulliparous women feel the first stirring in the 20th week of pregnancy. Multiparous little earlier - in about 18 weeks. Gynecologists recommend expectant mothers remember the date of the first stirring and enter it in the dispensary map pregnant. In determining the duration of pregnancy and birth date is important. For example, to determine the date of delivery should be to the date of the first stirring add 4 to 5 months for multiparous must add 5 months.