European Society of Endocrinology May 10 2025 New research links maternal PCOS and testosterone to reduced weekend activity in boys and weaker grip strength in girls, highlighting the lasting impact of in-utero hormone exposure on children’s physical development. Image Credit: Marta Design / Shutterstock Boys born to mothers who have polycystic ovary syndrome (PCOS) or who have higher levels of testosterone during the third trimester are more likely to be less physically active at age 7,