Table 1. Blood gases, glucose and temperature measurements in age-matched pregnant and unpregnant rats during ketamine administration.

Arterial blood gas	Unpregnancy	Pregnancy
Temperature (°C)	36.89 ± 0.35	37.11 ± 0.50
PaO2 (mm Hg)	103.73 ± 3.08	104.17 ± 3.44
PaCO2 (mm Hg)	39.54 ± 1.56	42.98 ± 2.92
HCO3−	23.90 ± 1.23	24.60 ± 1.71
pH	7.18 ± 0.01	7.23 ± 0.02
Glucose (mg/dl)	103.73 ± 1.76	107.97 ± 2.69

Arterial blood samples were sampled from the left cardiac ventricle immediately at the end of the 3 h ketamine administration. All measurements were within the normal physiological ranges and no statistical significance was found between the two groups. Data are presented as mean ± S.E.M. (n = 3).