How to determine the time of IVF transplantation
IVF is a kind of assisted reproductive technology, which is suitable for some infertile patients. Determining the time of IVF transplantation is critical to women's successful pregnancy. The following details how to determine the best time for IVF transplantation from four aspects: cycle monitoring, egg collection, embryo culture and endometrial preparation.
Periodic monitoring
Periodic monitoring is the first step of IVF transplantation, which mainly judges the ovarian function and endometrium of women through blood examination and B-ultrasound. The doctor will monitor the follicular development and estrogen level to determine whether the size and number of follicles are suitable for egg collection. At the same time, the thickness and shape of endometrium were observed by B-ultrasound to determine whether it is suitable for embryo implantation.
Periodic monitoring should start on the second day after menstruation, and should be checked every day or every few days. Based on the monitoring results, doctors can know the rate of follicular development and endometrial preparation of women, so as to determine the best time for transplantation.
Egg collection
Egg collection is one of the core steps of IVF, which aims to take mature eggs from female ovaries for embryo culture and transfer after fertilization. Egg collection is generally carried out when the follicle develops to an appropriate size.
The usual method is vaginal B-ultrasound monitoring. When the maximum diameter reaches 18-20mm, eggs are collected. This can ensure the maturity and quality of eggs, and improve the fertilization rate and the success rate after transplantation. Therefore, the timing of IVF transplantation needs to be determined according to the follicular development.
Embryo culture
Embryo culture is the key link of IVF, which involves the growth and selection of embryos. The embryo culture time is usually 3-6 days, depending on the quality and development of the embryo.
The doctor will select the most suitable time for embryo transfer according to the monitoring results and egg fertilization. Generally, the transferred embryo should have enough cells and normal development morphology to improve the success rate of implantation. Therefore, the time of embryo culture is one of the important factors to determine the time of IVF transfer.
Endometrial preparation
Endometrial preparation is also one of the key factors for successful transplantation. The endometrium will change during the menstrual cycle, and the transplantation time determined by the periodic monitoring is carried out when the endometrium is fully prepared.
Doctors usually give hormone drugs to help prepare the endometrium and make it reach its best state. For example, determine the thickness and shape of endometrium according to the monitoring results, and adjust the type and dosage of hormone drugs. Only when the endometrium is well prepared can the success rate of embryo implantation be improved.
summary
To determine the time of IVF transplantation, four factors should be considered comprehensively, including periodic monitoring, egg collection, embryo culture and endometrial preparation. Through periodic monitoring, women's ovarian function and endometrium can be understood; The timing of egg collection should be determined according to the development of follicles; The quality and development of embryos need to be taken into consideration in the time of embryo culture; Endometrial preparation needs to be assisted by hormone drugs. The success rate of IVF transplantation will be higher only when all these factors reach the optimal state.
