img width="800" height="530" title="3D printed microfluidic ''sperm syringe'' for high-quality sperm selection. a) Assembly of a 3D printed sperm syringe and schematic view of the device in the exploded view. The device consists of a 3D printed part with 560 parallel microchannels, a modified 5 mL syringe barrel, a laminate sheet to prevent mixing, a plunger for loading and unloading the sample, and a luer cap. b) Cross-section view of the device and close-up view of the microchannel network. Highly motile sperm are separated from non-motile/dead cells and debris in the raw semen chamber (cylindrical shell) by swimming through the microchannels to reach the selection chamber (central cylinder) where they are collected. c) Percentage vitality and d) percentage of sperm DNA fragmentation (%SDF) of sperm stored in commercially available plastic tubes and 3D printed tubes (made of a surgical guide resin) as a function of time, indicating the biocompatibility of the material and manufacturing process. Credit: Advanced Materials Technologies (2022). DOI: 10.1002/admt.202101291" alt="Sperm syringe offers new hope to infertile couples" src="/Editor/ebioueditorasp/asp/upload/image/20221123/16691931694930189.jpg"3D打印微流体“精子注射器”用于高质量的精子选择。