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Contents of this article
- What is the expected date of delivery
- How do pregnant women calculate the due date
- The due date calculator formula
- How to calculate the expected date of delivery
- How to calculate the expected date of pregnancy after conception a few days before menstruation
- What is the expected date of delivery
1. What is the expected date of delivery
1. The expected date of delivery refers to the day when the fetus matures in the pregnant woman\’s body and is about to be born. The expected date of delivery generally refers to 40 weeks of pregnancy. The expected date of delivery is calculated based on the last menstrual period of the pregnant woman. The expected date of delivery is not the exact time of delivery. Only about 5% of women give birth on the expected date of delivery.
2. Because everyone may ovulate early or late, it is difficult for pregnant women to accurately judge the specific time of conception. As long as the fetus is born half a month early or half a month behind the expected date, it is normal.
2. How do pregnant women calculate the due date
1. Some women Irregular menstrual cycles, forgetting the date of last menstrual period, or becoming pregnant again after childbirth or miscarriage before menstruation has begun. As long as you remember the time when nausea, vomiting and other early pregnancy symptoms occurred, you can also calculate the expected date of delivery. Because early pregnancy reactions generally appear around the 6th week of pregnancy, the calculation formula is: expected date of delivery = date of onset of early pregnancy reactions + 34 weeks
2. The fetal movements of first-time mothers are around the 6th week of pregnancy. It appears at the 18th week of pregnancy. Due to experience, multiparous women can feel fetal movement two weeks earlier than first-time mothers, that is, at the end of the 16th week. Therefore, the calculation formula is: the expected date of delivery for first-time mothers = the date of fetal movement + 22 weeks; the expected date of delivery for multiparous women = the date of fetal movement + 24 weeks. Through the above method, pregnant women can calculate and know the baby by themselves.Date of birth. In addition, if a pregnant woman cannot remember the time of her last menstrual period, has no early pregnancy reaction, and has not yet felt fetal movement, the doctor can help estimate the expected date of delivery through B-ultrasound and uterine fundus height.
3. Due date calculator formula
Calculation of women’s due date, There is a formula for this. It can generally be calculated based on a woman\’s last menstrual period. For example, you can add 9 or subtract 3 to the month of the last menstrual period. Then add 7 to the number of days to get your due date. For example, if it is January If your last menstrual period is on the 1st, then your due date is October 8th, which can also be calculated based on B-ultrasound.
4. Calculation formula of expected delivery date
1. If the last menstrual period is clear , the first day of the last menstrual period in the Gregorian calendar is used as the base, the month is subtracted by 3 or added by 9, and the number of days is added by 7. Those who are qualified should check the expected date of delivery based on the early pregnancy ultrasound report;
2. If the last menstrual period is unclear or the pregnancy occurs without menstruation during lactation, ultrasound examination can be used to help estimate the expected date of delivery. At the same time, if the time interval between the gestational age calculated based on the last menstrual period and the gestational age detected by ultrasound is more than 5 days, the expected date of delivery will be corrected based on the early ultrasound examination;
3. Assistance For those conceived through reproductive technology, such as in vitro fertilization, the last menstrual period should be calculated forward 18 days from the embryo transfer date to calculate the expected date of delivery.
5. How to calculate the due date of conception a few days before menstruation
1 Doctors generally use a formula to calculate the expected date of delivery. First, determine the first day of the last menstrual period, add 9 or subtract 3 to the month, and add 7 to the number of days. If it exceeds 31 days, add 1 to the month and subtract 30 from the number of days. If you can\’t count, use a calendar and count from the first day of your last period to 40 weeks. The prerequisite for this calculation is to remember your last menstrual period and have regular menstruation.
2. If menstruation is irregular or the last menstrual period is not remembered. Then the number of days of pregnancy should be judged based on the gestational sac in the first trimester. The date of possible conception. The formula for calculating gestational age based on the average inner diameter of the gestational sac: gestational age (number of days) = average internal meridian of the gestational sac (cm) + 30 average inner diameter of the gestational sac = (longitudinal diameter + transverse diameter + anteroposterior diameter) / 3. You can determine your gestational age by looking at your first trimester ultrasound.
6. What is the expected date of delivery
1. The expected date of delivery refers to the day when the fetus matures in the pregnant woman\’s body and is about to be born. The expected date of delivery generally refers to 40 weeks of pregnancy. The expected date of delivery is calculated based on the last menstrual period of the pregnant woman. The expected date of delivery is not the exact time of delivery. Only about 5% of women give birth on the expected date of delivery.
2. Because everyone may ovulate early or late, it is difficult for pregnant women to accurately judge the specific time of conception. As long as the fetus is born half a month early or half a month behind the expected date, it is normal.
This ends the content on estimating the expected delivery date. I hope it will be helpful to everyone.
