Send us Fan Mail Cooling works at 36 weeks. At 35 weeks, nobody is sure. Ben brings a new Journal of Perinatology analysis of the National Inpatient Sample, covering 1.4 million infants from 2016 to 2022, asking what happens when therapeutic hypothermia is offered just below the evidence line. Cooled 35-weekers died at higher rates than cooled 36-weekers, but within the 35-week group, cooling changed nothing either way. Coagulopathy rose with cooling. Mediation analysis says it wasn't the cau...