In a post facto study to examine whether sex of fetus was related to d
uration of nulliparas' labor 30 nulliparous (had not given birth previ
ously) women who delivered boys and 30 others who delivered girls were
matched according to the criteria that they were nulliparous, receive
d an epidural for analgesia during labor, and their labors mere either
induced or augmented. All delivered vaginally. Duration of labor was
not statistically significantly related to sex of the fetus.