What is the sustained pregnancy rate? I believe the vast majority of people do not know, after all, we are not professional clinical doctors, and we have little exposure to these obscure concepts, so we have no way to talk about understanding them. IVF is a common way to solve infertility in families, and it is also widely accepted. Although its success rate is high, there are always times when we are careless and lose track. Below, we will learn about the calculation method of sustained pregnancy rate.
Calculation method for sustained pregnancy rate
Success rate is a general concept, and there are various methods for calculating success rates based on different goals. For example, in China, clinical pregnancy is generally the main statistical indicator, and the success rate of IVF in China refers to the clinical pregnancy rate; The United States generally uses live birth (the birth and survival of a baby) as the main statistical indicator, and the success rate of in vitro fertilization in the United States refers to the live birth rate (also known as the baby holding rate).
Persistent pregnancy refers to a pregnancy that lasts until 20 weeks or later. Clinical pregnancy rate=number of clinical pregnancies/number of transplant cycles, live birth rate (holding rate)=number of births with live births/number of transplant cycles. The calculation of success rate will be further subdivided into fresh cycles (transferring unfrozen embryos during the egg retrieval cycle), frozen cycles (embryos that have been frozen and are selectively revived for transplantation), donor eggs, etc., and classified and counted according to the age of the female party (excluding donor eggs).
What is the clinical significance of pregnancy rate
Embryonic development is a dynamic process, and due to various reasons such as chromosomal abnormalities, ectopic pregnancy, and uterine problems, there may be a certain proportion of miscarriages. Therefore, the live birth rate is always lower than the clinical pregnancy rate. For reproductive centers, achieving clinical pregnancy can already reflect their technical level, so the clinical pregnancy rate can be calculated as a technical indicator; For patients, the purpose of undergoing in vitro fertilization is to obtain healthy live offspring, and clinical pregnancy is only a process, not an endpoint, so calculating the live birth rate (baby holding rate) is more meaningful.
In fact, there are many "rates" in clinical practice, such as embryo implantation rate, miscarriage rate, fresh cycle delivery rate, frozen thawed embryo transfer delivery rate, live birth delivery rate, stillbirth delivery rate, etc. Although they are not common in daily life and we do not know why, they all have certain clinical significance and are of great help to research.
