.Publisheru00e2 $ s note Springer Attribute remains neutral with regard to administrative cases in posted maps and institutional affiliations.This is a recap of: Bhat-Nakshatri, P. et al. Single-nucleus chromatin availability and transcriptomic chart of bosom tissues of girls of unique hereditary origins. Nat. Med. https://doi.org/10.1038/s41591-024-03011-9 (2024 ).