Fetoplacental Circadian Rhythms Develop and Then Synchronize to the Mother In Utero

Keenan Bates, Elizabeth Sapiro, Jacob L. Amme, Ron McCarthy, Sarah L. Speck, Varun Vasireddy, Ethan Roberts, Carmel A. Martin-Fairey, Miguel-E. Domínguez-Romero, Sandra P. Cárdenas-García, Sarah K. England, Erik D. Herzog

Journal of Biological Rhythms

Published online on April 10, 2026

Abstract

Journal of Biological Rhythms, Ahead of Print.
Circadian rhythms in gene expression and hormones are ubiquitous across species and differentiated cell types, yet their developmental origins remain poorly understood. This study aimed to determine if daily rhythms can be detected in utero and if they ...