Definition of multiple pregnancy and embryo transfer technology
Multiple pregnancy refers to the pregnancy of more than one fetus. In IVF technology, in vitro fertilization (IVF) or minimally invasive embryo transfer (ICSI) and other technologies are used to transfer the fertilized eggs or embryos to the mother's uterus, increasing the chance of successful pregnancy. However, these techniques also increase the risk of multiple pregnancies.
First, in the process of embryo transfer, the number of embryos implanted is adjustable. In general, the number of embryos implanted is proportional to the risk of multiple pregnancies. Doctors and couples need to make a decision between weighing the success rate of pregnancy and the risk of multiple pregnancies. Secondly, in the process of embryo grading, selecting embryos with better growth potential for implantation can reduce the risk of multiple pregnancy.
Therefore, the assessment of the risk of multiple pregnancy needs to consider the number and quality of embryos implanted.
Potential risks of multiple pregnancy
Multiple pregnancy has a higher risk of complications than single pregnancy. Multiple pregnancy may lead to premature delivery, fetal dysplasia, placental abruption, placenta previa, pregnancy induced hypertension and other complications. At the same time, multiple pregnancy infants also face higher neonatal mortality and short-term and long-term health problems.
Premature delivery is the most common complication of multiple pregnancy. As the number of babies carried by the uterus increases, the placenta is in short supply, resulting in stunting and premature delivery. Premature fetuses have low viability and are prone to respiratory distress, neonatal intensive care and long-term neurodevelopmental problems.
In addition, the position of multiple pregnancy infants in the uterus is relatively crowded, and the intrauterine environment is unstable, which is easy to cause placental related complications such as placenta previa and placental abruption. These complications may lead to bleeding during pregnancy, premature delivery and termination of pregnancy.
Risk assessment method of multiple pregnancy
For risk assessment of multiple pregnancy, doctors usually adopt the following methods:
1. Evaluation of embryonic development: evaluate the quality of embryos by their appearance and cell division. Embryos with better quality have higher development potential, and the number of implanted embryos can be moderately reduced, thus reducing the risk of multiple pregnancy.
2. Selection of embryo implantation quantity: according to the patient's age, reproductive history, embryo quality and other factors, the doctor will recommend the implantation of an appropriate number of embryos. In general, multiple pregnancies can be avoided to the greatest extent by implanting a single embryo.
3. Reference to clinical experience: doctors will comprehensively assess the risk of multiple pregnancy according to their own experience and the situation of patients. They will consider factors such as uterus shape, patient age, embryo quality, and tailor personalized embryo implantation programs.
conclusion
The risk of multiple pregnancy to mother and baby cannot be ignored. The risk of multiple pregnancy can be reduced by assessing the number and quality of embryos implanted. At the same time, in practice, doctors should develop appropriate embryo transfer programs based on clinical experience and patients' conditions, so as to ensure the safety and success rate of IVF.
In conclusion, the risk assessment of multiple pregnancy needs to consider the factors of the quantity and quality of embryo implantation, and pay attention to reducing the potential risk of multiple pregnancy on maternal and infant health.
