Babies who yawn more in the womb tend to be born at lower weights, suggesting fetal yawning may signal early growth or stress.

Even in the womb, where all oxygen is provided by the parental placenta, fetuses can-and do-yawn. More yawns during observation were associated with a lower weight at birth-potentially indicating mild ...

Women who have Cesarean births at an advanced stage of labor are about eight times more likely to develop scars in the womb which are known to increase the likelihood of premature births in future ...