In the 1990s, quantitative fluorescence PCR (QF-PCR) technology based on short tandem repeat (STR) began to be applied in clinical practice[1]。 For more than 20 years, this technology has quickly become an important detection method for prenatal auxiliary diagnosis due to its advantages such as speed, low cost, high throughput and no need for cell culture. Relevant domestic and foreign societies have issued relevant clinical application guidelines and expert consensus, which greatly promoted the clinical application of this technology[2,3]。 However, these guidelines and consensus are mostly from the perspective of clinicians, and elaborate on the clinical indications, interpretation of results and genetic counseling of the technology in detail. There are not many specifications for laboratory requirements, operating procedures, quality control and other specifications for the application of the technology.