A recent investigation reveals that maternal hormonal imbalances during pregnancy can have lasting effects on offspring. Specifically, boys born to mothers with polycystic ovarian syndrome (PCOS) or elevated testosterone levels in the third trimester tend to exhibit reduced physical activity by age seven. Conversely, girls exposed to higher prenatal testosterone levels may experience diminished muscle strength at the same age. The study conducted by researchers from Odense University Hospital and the University of Southern Denmark analyzed data from 695 mother-child pairs, employing advanced tracking technology to objectively measure child activity levels.

The findings suggest a direct link between maternal testosterone levels and the long-term health outcomes of children. While boys show decreased physical activity, particularly on weekends, girls display lower muscle strength without changes in activity patterns. These hormonal influences could potentially predispose children to obesity and cardiovascular disease later in life, prompting further research into the transgenerational effects of PCOS-related conditions.

Boys' Reduced Physical Activity Linked to Maternal Hormones

Data from the study indicates that boys whose mothers had elevated testosterone levels or PCOS during pregnancy are less physically active by the time they reach seven years old. This trend was most noticeable during weekends, suggesting a lifestyle shift away from regular movement even when free time is available. Importantly, this decrease in activity cannot be attributed to factors such as birth weight or pre-pregnancy BMI, pointing instead to the role of maternal hormones.

Researchers employed an accelerometer to track the physical activity of these children, providing objective evidence that surpasses traditional questionnaire-based studies. Lead author Camilla Viola Palm emphasized that the results highlight how pre-pregnancy health conditions like PCOS might influence the next generation’s physical habits. She warned that reduced physical activity in boys, especially during leisure periods, could contribute to future risks of obesity and cardiovascular disease. This discovery underscores the importance of understanding and managing maternal hormonal fluctuations for better health outcomes in offspring.

Hormonal Exposure in Girls: Implications Beyond Activity Levels

In contrast to boys, girls exposed to heightened testosterone levels during pregnancy do not show signs of reduced physical activity. Instead, they demonstrate weaker muscle strength at age seven. This finding suggests that while activity patterns remain unaffected, other aspects of their physical development may be influenced by prenatal hormone exposure. Such variations could carry potential long-term health implications, necessitating further exploration.

This study adds to previous findings showing that boys exposed to increased prenatal testosterone also experience higher body fat and reduced grip strength in early childhood. The research team plans to continue monitoring these children as they transition into adolescence, aiming to determine whether these effects persist and affect broader health indicators such as obesity, blood pressure, and type 2 diabetes risk. Although PCOS is traditionally viewed as a condition affecting women, its metabolic and cardiovascular consequences may extend across generations, influencing both genders differently. By focusing on these connections, the study provides valuable insights into the intricate relationship between maternal health and child development.