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We evaluated the influence of hypoxic hypoxia on lactate, creatinine and urea concentrations in the amniotic  fluid (AF) of rabbits on 27-28th day of pregnancy. Rabbits were randomly sudivided into two groups: experimental (n=9)  and control (n=6). Rabbits of experimental groups were placed in a hypoxic chamber containing 10±2% oxygen  and 90±2% nitrogen for 1 h and then were euthanized, AF was extracted from the amniotic sacs via disposable syringe.  Acute hypoxic hypoxia had no effect on the AF volume, increased (1.4-fold) lactate, (1.3-fold) creatinine and  (1.1-fold) urea concentrations in AF. In contrast to animals of the control group, lactate concentration in the groups  with hypoxic hypoxia correlated with the creatinine (r=0.71, p&lt;0.0001, n=35) and urea concentrations in the AF  (r=0.81, p&lt;0.0001, n=35). These results suggest that acute hypoxic hypoxia in late pregnancy causes changes  in the biochemical composition of AF; these changes are characterized by high lactate concentrations, and the fetus  and uterus can be the source of increased lactate level in AF.

Acute hypoxic hypoxia increases lactate concentration in amniotic fluid of rabbits on 27-28th day of pregnancy