RESUMEN
[Case 1] At 37 weeks and 5 days, a 27-year old woman was admitted to our clinic due to spontaneous rupture of the membranes. Her first pregnancy had come to term in a cesarean section delivery, because of toxemia and the breech presentation. This time, she wanted to deliver spontaneously. She didn't go into spontaneous labor, however, 44 hours after rupture of her membranes. Past history included the cesarean section, so labor induction with oxytocin or prostaglandin was not attempted. Active labor was established after administered keishibukuryogan as a saiseito, and she delivered spontaneously at 38 weeks and 1 day.<br>[Case 2] At 39 weeks and 5 days, a 33-year old woman was admitted to our clinic, due to elective induction of labor. Her first pregnancy had come to term in a labor induction with oxytocin for the uterine inertia. In this pregnancy she wanted to deliver without the use of oxytocin. Active labor was established after administered Keishi-bukuryogan as a Saisei-to, and she delivered spontaneously at the same 39 weeks and 5 days.<br>The present cases suggest that keishibukuryogan may be effective for establishment of labor, not to say a labor inducer or stimulator such as oxytocin and prostaglandin.