Effects of different doses of intraumbilical oxytocin on the third stage of labor.

Objective: To determine the optimal dose of oxytocin to be injected intraumbilically after fetal delivery for active management of the third stage of labor.

Methods: A prospective randomized study was carried out with 125 primigravidas to compare the duration of the third stage of labor following the intraumbilical administration of 50 mL of a normal saline solution alone (in a control group), or with 10 IU, 20 IU, or 30 IU of oxytocin. The volumes of blood lost were also compared.

Results: Compared with the control group, the duration of the third stage of labor was significantly reduced in the 3 study groups (P<0.001), and the maximum reduction was in the group that received 30 IU of oxytocin. Blood loss and hematocrit values followed the same pattern.

Conclusions: Administering 30 IU of oxytocin intraumbilically in 50 mL of a normal saline solution after fetal delivery is a simple, noninvasive, and effective method for active management of the third stage of labor.