Eley VA, et al. - Using a sub-set of participants from a single-centre, prospective cohort study, researchers investigated the correlation of abdominal subcutaneous fat thickness measured to skin-to-epidural space distance at delivery, as well as compared this with the booking body mass index. This study included 463 women, with a median (IQR) booking body mass index of 25.0 kg/m² (21.8–29.3) and subcutaneous fat thickness of 16.2 mm (13.0–21.0). Also, 5.0 cm (4.5–6.0) was the median (IQR) skin-to-epidural space distance. Findings revealed a stronger association of booking body mass index vs subcutaneous fat thickness, with skin-to- epidural space distance at delivery, explaining 47% of the variation in the skin-to-epidural distance.