In this study, we compared the rate of endometritis after cesarean sec
tion in two age groups. The first group consisted of patients who were
17 years old or younger (teenage group) and the second group of patie
nts were 35 years of age or older (advanced maternal age group). Patie
nts in each group were matched for length of labor, length of rupture
of membranes, and the use of prophylactic antibiotics. In the teenage
group, 18 of 41 (43.9%) developed endometritis compared with 6 of 41 (
14.6%) in the advanced maternal age group (P < 0.003). This study supp
orts the concept that young age is a risk factor for endometritis afte
r cesarean section.