.Publisheru00e2 $ s note Springer Nature remains neutral for supervisory insurance claims in released charts as well as institutional affiliations.This is a summary of: Hanson, C. et cetera. A time-stratified, caseu00e2 $ "crossover research of warm direct exposure and also perinatal mortality coming from 16 healthcare facilities in sub-Saharan Africa. Nat. Med. https://doi.org/10.1038/s41591-024-03245-7 (2024 ).