Scripps Research Institute Nov 13 2025 When labor begins, the uterus must coordinate rhythmic, well-timed contractions to deliver the baby safely. While hormones such as progesterone and oxytocin are key contributors to that process, scientists have long suspected that physical forces-in this case, the stretching and pressure that accompany pregnancy and delivery-also play a role. Now, a new study from Scripps Research published in Science on November 13, 2025, reveals how the uterus senses and