How to estimate the expected date of IVF
Since the development of IVF technology in the 1970s, it has become a universal assisted reproductive technology. However, unlike natural pregnancy, the estimation of the expected date of delivery of IVF is relatively complicated. This article will elaborate on the date of the last menstruation of the pregnant woman, the ultrasonic examination, the time of embryo transformation and the data analysis of the maternity hospital.
Date of the last menstrual period of the pregnant woman
The expected date of IVF is usually calculated from the date of the last menstrual period of the pregnant woman. In the case of natural pregnancy, the fertilized egg forms in the ovary and enters the endometrium with ovulation, and then begins to develop further. Therefore, the expected date of delivery of pregnant women is usually 14 days from the last menstruation. However, due to the different ways of IVF conception, it needs to be adjusted according to the specific situation.
In IVF technology, eggs are usually fertilized in vitro and then transferred back to the mother's uterus. Therefore, the expected delivery date of IVF needs to be added with the date of embryo transfer. When there is a large difference between the date of the last menstrual period of a pregnant woman and the date of embryo transfer, the date of embryo transfer is usually used to calculate the expected delivery date.
Ultrasonic inspection
Ultrasonic technology is a commonly used method to estimate the expected date of delivery of test tube babies. Ultrasonic examination can observe the development of embryos, including placenta and amniotic fluid. By measuring the fetal head diameter, abdominal circumference, femur length and other parameters, doctors can get a more accurate expected date of delivery.
During ultrasonic examination, the pelvic area of pregnant women is usually coated with gel, and then the ultrasonic probe is placed on the abdomen. Doctors can determine the development of the fetus by observing the ultrasonic image, and obtain the expected date of delivery according to the measured parameters. Although this method is accurate, there are few observations of the fetus during early pregnancy, and sometimes there may be some errors in the estimation of the expected date of birth.
Time of embryo turnover
The time of embryo transformation refers to the time from embryo transfer to embryo implantation. Pregnancy begins only after the embryo is implanted in the uterus. The expected date of IVF needs to be adjusted according to the time of embryo transformation.
Generally speaking, the time of embryo transformation is calculated from the third day after embryo transfer. However, due to differences in the quality of the embryo and the environment in the uterus, some embryos may take longer to implant. Therefore, the delay of embryo fate may lead to the delay of the expected date of delivery.
Data analysis of maternity hospital
Maternity hospitals can provide more accurate estimation of the expected delivery date of test tube babies through data analysis. Hospitals usually collect a large number of data related to IVF mothers, such as transfer cycle, embryo quality, and assisted pregnancy technology. Through the analysis of these data, the hospital can draw some statistical results to predict the expected delivery date of test tube babies.
Through the data analysis of the maternity hospital, doctors can understand the trend of IVF delivery schedule under different conditions. For example, IVF babies with better embryo quality may be easier to be implanted and born early, and the impact of assisted pregnancy technology on the expected date of delivery may also be different. Therefore, when estimating the expected delivery date of IVF, doctors usually take these factors into consideration to provide more accurate predictions.
Summary
Estimating the expected date of delivery of test tube babies is a complex task, which needs to consider many aspects such as the last menstrual date of the pregnant woman, ultrasonic examination, the time of embryo transformation, and data analysis of the maternity hospital. Although there are some errors, these methods can provide more accurate estimates for the expected date of IVF. For IVF families, accurate estimation of the expected date of birth is very important for preparing for newborn babies and making prenatal preparations.
