Detailed explanation of the method for calculating the due date of IVF
In vitro fertilization refers to a fetus that is artificially fertilized outside the body and develops into an embryo through infertility treatment. The due date calculation for IVF is different from the due date calculation for women who conceive naturally. The method for calculating the expected date of IVF is explained in detail below from the following four aspects.
Part 1: B-ultrasound measurement method
B-ultrasound measurement is a method of calculating the expected date of delivery based on the size of the embryo and the growth rate of the fetus. This method can be performed within 7-10 days after artificial insemination, and the expected date of delivery is calculated by measuring the size of the embryo. About 5 weeks after artificial insemination, B-ultrasound examination can measure the size of the embryo to determine the expected date of delivery; if the B-ultrasound examination is performed in the first trimester, the calculation of the expected date of delivery will be more accurate.
Part 2: Calendar Method
The calendar method is also a common way to calculate the due date for IVF, which is based on the length of the menstrual cycle. The calculation method is based on the first day of the last menstrual period, plus 280-282 days, to get the expected date of delivery. This method is suitable for women with regular menstrual cycles and excludes other influencing factors.
Part 3: Twin Grammar Formulas
The twin grammar formula can calculate the due date of IVF by measuring the gestational age and the number of miscarriages. The formula is as follows:
Expected date of delivery = day 1 of the last menstrual period before miscarriage + 280 days ÷ 2 – minus 30-7 ×? (number of miscarriages – 1) days.
The advantage of the twin grammar formula is that it can be customized according to gestational age and number of miscarriages, so the prediction results are more accurate.
Part 4: Ovulation day method
The ovulation day method is a method of calculating the expected date of delivery based on a woman\’s ovulation day and artificial insemination time. The ovulation day is generally in the middle of the menstrual cycle. If artificial insemination is performed at this time, the expected date of delivery can be predicted by calculating the time. According to statistical data, the prediction accuracy of the ovulation day method is relatively high, but it needs to be carried out during artificial insemination.
Conclusion
The above are four common methods for calculating the due date of IVF. You can choose according to a woman’s menstrual cycle, behavior and other factors. You can also use a combination of multiple calculation methods to achieve more accurate prediction results.
