Time for determining the number of IVF embryos
IVF is an assisted reproductive technology that can help couples who cannot conceive naturally achieve their reproductive aspirations. It is very important to determine the number of embryos before performing the IVF procedure. In general, the determination of the number of IVF embryos can be considered from the following aspects.
Ultrasonic examination
Ultrasonography is a non-invasive and safe method, which can inspect female reproductive organs, including ovary, uterus, fallopian tube, etc. Through ultrasonic examination, doctors can observe and measure the number of follicles in the ovary, thus inferring the number of women's eggs. Generally speaking, ultrasound examination before ovulation every month can get more accurate results.
In the process of IVF, after ovulation promotion and other auxiliary measures, the number of female follicles may increase, which also means that more eggs may be obtained. However, ultrasound can only obtain an approximate number range, and can not be accurate to the number of each egg.
Response of ovarian stimulating drugs
In the process of IVF, women usually receive ovarian stimulation drugs to promote the simultaneous development of multiple ovarian follicles. The doctor assesses the effect of ovarian stimulation by monitoring the ovarian response, and initially determines the number of follicles.
Generally, ovarian stimulation drugs can make the ovary develop 3-20 follicles. However, sometimes the ovary will produce more follicles than expected, which may require corresponding measures to control the number of follicles to avoid the risk of multiple pregnancy.
Observations during egg retrieval
Fetching eggs is a key step in the process of IVF, through which the number of mature eggs can be directly observed. Before taking eggs, the doctor will preliminarily estimate the number of eggs according to the ultrasonic examination and the response of ovarian stimulation drugs.
During the operation, doctors obtain eggs by puncturing the ovary and extracting eggs. In this process, doctors can directly observe the number of follicles in the ovary and the number of mature eggs in each follicle. The observation results at this time are the most direct and accurate, and can be used as the final determination of the number of embryos.
Summary
The determination of the number of IVF embryos is an important link in the process of IVF. Ultrasound examination, ovarian stimulation drug response and observation during egg retrieval can be used to preliminarily determine the number of eggs and embryos. However, until the end of the egg retrieval process, doctors can accurately determine the final number of embryos.
Each aspect has its limitations. Ultrasound can only provide a rough range of quantities, and the effect of ovarian stimulation drugs will also vary from person to person. The observation results during egg retrieval are the most accurate. Therefore, in the process of IVF, it is necessary to comprehensively consider multiple factors to determine the most suitable number of embryos to improve the success rate of IVF.
