Welcome back for episode two of sMater, where Dr Sarah Janssens, Director of Obstetrics and Gynaecology at Mater Mothers' Hospitals, delves into the role of progesterone in preterm births.  How does it work? Who does it benefit? How effective is it really? And are there any long-term risks for mother or baby? Tune in to find out.  To learn more about Mater, visit mater.org.au.