Ms. W is 41 years old and AMH0.27. In 2017, she did second-generation test tubes in Macau, taking 5 eggs, fertilizing 2 and transplanting 2 without implantation. In 2018, she found Chuen to prepare to go to the United States for three generations of IVF. Dr. Sandy of the San Diego Reproductive Center in the United States customized a micro-stimulation ovulation plan based on her age and ovarian function decline. Ovulation-stimulating microstimulation, referred to as "micro-promoting" for short, compared with the traditional long-protocol and short-protocol ovulation-promoting methods, small-dose drugs and mild ovulation-promoting methods are used to obtain fewer, but higher-quality embryos at a time. According to the results of clinical application for many years, micro-stimulation has fewer ovulation-promoting drugs and less ovarian stimulation. A small amount of ovulation-promotion can be used to mature the best follicles with the best sensitivity to the drug and reduce the effect of the drug on egg quality. , Closer to the natural state, the eggs obtained are of higher quality and better endometrial receptivity.