Spermbots deliver sperm to egg

In order to help “poor swimmers”, scientists developed “spermbots” that can deliver healthy sperm to an egg. The tiny metallic helices are just large enough to fit around the tail of a sperm. Their movements can be controlled by a magnetic field and lab testing showed they can deliver sperm to an egg for potential fertilization. Credit: Cellular Cargo Delivery: Toward Assisted Fertilization by Sperm-Carrying Micromotors Mariana Medina-Sánchez, Lukas Schwarz, Anne K. Meyer, Franziska Hebenstreit, and Oliver G. Schmidt Nano Letters, DOI: