Magnetic-activated cell sorting (MACS) MACS is a method for selecting live and functional sperm that arenโt apoptotic (dying). Synonyms: Magnetic-activated cell sorting, MACS Related Articles: Evidence-based recommendations from ESHRE for 27 IVF add-ons Highlights from ESHREโs 39th Annual Meeting (2023) Monthly IVF research roundup (July 2025) Italian fertility group issues 2025 guidance on 28 IVF add-ons Highlights from ASRMโs 81st annual meeting (2025)