From the first days of pregnancy, expectant mothers want to know the day on which the birth will take place. You can calculate this date yourself at different stages of pregnancy and in different ways.
Instructions
Step 1
Determination of the day of birth by the day of ovulation and the date of conception. Ovulation occurs in the middle of the menstrual cycle. Calculate the middle of the cycle and add 280 days. This version of the calculation will be more reliable if in the last cycle the intercourse was single. Do not forget that the date of conception may not coincide with the date of intercourse, because sperm can be in the female body for several days.
Step 2
Formula Negele. Gynecologists often use this method of calculating the date of birth. This formula will be more accurate for those with a 28-day regular cycle. Subtract three months from the first day of the cycle, then add seven days. For example: your period ended on September 10th. Minus three months - June 10. Add 7 days. June 17th will be the approximate day of birth.
Step 3
Calculation of the day of birth by means of ultrasound. This method is one of the most accurate. After going through this procedure in the early stages of pregnancy, you will be able to find out its duration (up to the day), the approximate date of conception and the date of birth.
Step 4
Determination of the day of birth by performing a gynecological examination. It is possible to absolutely accurately establish the gestational age and the approximate date of delivery, starting from 3-4 weeks (but no later than 12, since each child develops individually). During a manual examination of the female internal genital organs, the gynecologist focuses on the size and shape of the uterus.
Step 5
In cases where it is difficult to determine the gestational age in the early stages, this can be done with the first movements of the baby in the womb. The mother feels the real movements of the baby at the 20th week of pregnancy (primiparous) or at 18 (multiparous). Add to the term in the first case 20 weeks and 22 weeks in the second. You will receive an almost accurate due date. There are exceptions when the mother feels the baby is moving at 14 or 16 weeks. Gynecologists are skeptical about this and tend to attribute such sensations to the work of the intestines, but there is always the possibility that the expectant mother is really very sensitive. In this case, this method will not be accurate.
