How to calculate the expected date of IVF?
IVF is an embryo that is cultivated in the laboratory through in vitro fertilization technology, and then the embryo is implanted into the mother's uterus to develop a baby. The expected date of IVF is slightly different from that of naturally conceived infants, which usually needs to be determined by professional tests and calculations in hospitals. The following will elaborate on the calculation method of IVF's due date from four aspects.
1. Calendar method of embryo transfer
The calendar method of embryo transfer is a commonly used method to calculate the expected delivery date of test tube babies. The date of embryo transfer is the date when the fertilized egg is transferred into the uterus. According to the development of the fertilized egg, the doctor can calculate the expected age of the embryo. Generally speaking, the second day after the transfer of a fertilized egg is the late embryo stage, the third day is the blastocyst stage, and the fifth day is the late blastocyst stage. According to the development of the embryo, doctors can accurately determine the expected date of the embryo.
The advantage of using the calendar method of embryo transfer to calculate the expected delivery date of IVF lies in its simplicity and high accuracy. However, this method assumes that the transfer date of the fertilized egg is the fertilization date, while in fact, the fertilization date is not necessarily equal to the transfer date. Therefore, other methods need to be combined to ensure the accuracy of calculation.
2. Progesterone control technology
Hormone control technology in IVF assisted reproductive technology can also be used to calculate the expected date of delivery. In the process of IVF, doctors will give pregnant women artificial hormones to help embryo implantation and development. The use of these hormones needs to be determined according to the physical condition of the pregnant woman and the development progress of the embryo. By monitoring hormone levels in the blood of pregnant women, doctors can calculate the expected age of the embryo.
One advantage of using hormone control technology to calculate the expected delivery date is that it can be accurately adjusted according to the characteristics of pregnant women, so the accuracy is high. However, this method requires multiple hormone monitoring and adjustment, which is time-consuming and laborious. Moreover, different pregnant women may have different responses to hormones, so the calculation of expected delivery date still needs to be verified with other methods.
3. Ultrasonic testing technology
Ultrasonic detection technology is a commonly used method to measure the size and development of embryos. Through ultrasonic detection, doctors can measure the size of the fetal head, buttocks, humerus and other parts, thus inferring the fetal weight and age. Combined with the last menstrual date of pregnant women and the results of ultrasonic testing, doctors can more accurately calculate the expected date of IVF.
Ultrasonic detection technology has the advantages of high accuracy and non-invasive, and is widely used in clinical practice. The expectant date of IVF predicted by ultrasonic testing is generally similar to that calculated in the calendar method of embryo transfer, so it can be used as a method of mutual verification.
4. Pregnancy Week Calculator
The pregnancy week calculator is also a convenient and accurate tool for calculating the expected date of delivery of IVF babies. The pregnancy week calculator can calculate the expected age of the embryo according to the last menstrual date of the pregnant woman and the date of fertilized egg transfer, and estimate the expected date of delivery according to the cycle length and fertilization date of the pregnant woman.
The advantage of using the pregnancy week calculator is its simplicity, convenience and high accuracy. Some hospitals and assisted reproductive institutions provide online pregnancy week calculators, which can obtain the expected date of IVF by inputting relevant data. However, when using the pregnancy week calculator, it is necessary to ensure that the date entered is accurate to avoid calculating the deviation.
Summary
By means of embryo transfer calendar, hormone control technology, ultrasonic detection technology and pregnancy week calculator, the expected date of IVF can be calculated more accurately. However, due to the development of IVF and the characteristics of IVF technology, there are still some uncertainties in the calculation of the expected delivery date. Therefore, it is necessary to pay close attention to the development of pregnant women and fetuses after determining the expected date of delivery, and make corresponding adjustments and interventions in a timely manner.
