Since the 1970s, numerous studies have examined pelvic features potentially associated with pregnancy and childbirth. While some have identified correlations between certain skeletal traits and maternity, others have found no significant relationship. The contradictory results of these studies, along with the possible influence of confounding variables (age, weight, stature, general morphology, pelvic dimensions, etc.), make it difficult to clearly identify which traits are truly linked to parity.

Among the markers recently described, two morphological features on the ventral apex of the sacral ala in female individuals - the sacral preauricularextension (SPE) and the sacral pre-auricular notch (SPN) - are investigated.

The present study aims to further investigate positive correlation between these markers and parity using a larger sample from the Simon identified skeletal collection, for which detailed obstetric data are available. The goal is to strengthen the reliability of the association between the sacral traits and parity. Additionally, a third feature, the dorsal pubic pitting (DPP), has been included in the analysis. This marker, although long debated, was recently identified as the only feature significantly correlated with maternity.