Number and success rate of embryo transfer in vitro infants
IVF is a kind of assisted reproductive technology, which is often a blessing for those couples who have difficulty in pregnancy. However, the success rate of IVF is not 100%, so multiple embryo transfers are needed to increase the success rate. In this article, we will discuss the number of IVF embryo transfers from various aspects.
In vitro fertilization and embryo quality
In vitro fertilization is the first and critical step of IVF. The female egg will be fertilized with the male sperm in the laboratory to produce an embryo. Before embryo transfer, the doctor will evaluate the quality of the embryo. If the embryo quality is good, that is, the morphology is normal and cell division is active, then the success rate after transplantation is higher. But sometimes, due to various reasons, the quality of embryos may be poor. This may be due to the influence of many factors, such as women's age and the number of fertilized eggs. Therefore, in order to improve the success rate of IVF, it is sometimes necessary to conduct multiple IVF and embryo quality assessment.
Some hospitals, such as the Assisted Reproduction Center of Peking Union Medical College Hospital in Beijing, China, have adopted a new technology called embryo time limited incubation. This technology can improve the success rate of IVF by adjusting the time and conditions of embryo culture and selecting high-quality embryos for transplantation. The introduction of this technology has brought dawn to many couples who have difficulty in pregnancy.
The Influence of Age on the Success Rate of IVF
The age of women has an important impact on the success rate of IVF. Generally speaking, women under 35 years old have a high success rate; The success rate decreases with age. This is because the number and quality of female eggs will decrease with age. A study shows that women over 35 years old need multiple embryo transfers to achieve the same success rate.
However, not all women of all ages need multiple embryo transfers. The success rate will vary with each individual's situation. Some young women may need only one embryo transfer to become pregnant, while some older women may need three or more attempts.
Risks associated with IVF
Although IVF embryo transfer is an effective way of reproduction, it also has certain risks. Some studies have shown that multiple embryo transfers may increase the risk of complications such as uterine adhesion and uterine cavity effusion. In addition, long-term use of ovulation promoting drugs may increase the incidence of ovarian hyperstimulation syndrome, thus bringing some side effects to women's bodies.
Therefore, before IVF embryo transfer, couples should fully understand and consider these risks, and fully communicate and discuss with doctors.
summary
IVF is a very complex process, in which the number of embryo transfers is one of the important factors that determine the success rate. The quality of IVF, female age, individual differences and related risks will affect the number of embryo transfers. Although it is not certain how many embryo transplants are needed to succeed in pregnancy, the success rate of IVF can be improved to a certain extent through full communication with doctors and comprehensive evaluation of individual conditions.
