Procedures
The enrolled subjects’ sociodemographic, clinical and anthropometric characteristics, and flexibility, were assessed at the 16th w.g. Flexibility, height and weight were measured again at the 34th w.g., along with abdominal muscle thicknesses and the IRD. Birth and obstetric outcomes (duration of labour, gestational age, type of birth, birth weight) were collected from the subjects’ Pregnancy Health Documents and digital medical records. Umbilical cord blood was collected at birth.