--- O42.011 Preterm premature rupture of membranes, onset of labor within 24 hours of rupture, first trimester

--- O42.012 Preterm premature rupture of membranes, onset of labor within 24 hours of rupture, second trimester

--- O42.013 Preterm premature rupture of membranes, onset of labor within 24 hours of rupture, third trimester

--- O42.019 Preterm premature rupture of membranes, onset of labor within 24 hours of rupture, unspecified trimester