Uterine Metabolism Changes During Gestation in Rats of Different Age Groups. ∗ †

Summary

Change in the TTC reduction rate of uterine tissue during gestation in varying aged rats was determined. Old females (300-330 days) and young females (60-80 days) showed an increase in uterine TTC reduction rate at day 12 post-breeding, whereas females 120-150 days old did not. Fetal loss was greater in the 300-330-day-old and the 60-80-day-old females than in the 120-150-day-old females. The stage of gestation when increased fetal losses occurred appeared to coincide with the rise in uterine TTC reduction rate at day 12 post-breeding.