Human assisted reproductive technology （ART）includes artificial insemination (AI) and in vitro fertilization and embryo transfer (IVFET) and their derivatives.In recent years

the proportion of infertility patients has increased.In addition

with the opening of the second child policy

the proportion of elderly patients with fertility needs has increased.ART technology has become an important way to treat infertility patients.With the development of science and technology

many derivative technologies

including oocyte maturation in vitro

timelaps system

sperm microfreezing

metabolomics assessment of embryonic development potential

make up for the shortcomings of ART technology

which make ART technology more perfect

and more accurately meet the needs of patients.However

there are still some problems in the application of new technology.In the actual implementation process

the new technology need to constantly improve

update and complete.