Table 2.

Comparison of litter characteristics between non-stress (NS) control litters and litters exposed to unpredictable prenatal stress.

Characteristic		NS Control	Prenatal Stress
Litter Size		12.0 ± 0.58 (22)	12.3 ± 0.51 (23)
	Number of Female Pups	6.23 ± 0.34	6.39 ± 0.54
	Number of Male Pups	5.73 ± 0.50	5.96 ± 0.39
Weight at Weaning
	Female Pups	63.3 ± 0.64 gm	62.1 ± 0.72 gm
	Male Pups	67.1 ± 0.80 gm	65.8 ± 1.14 gm

Values given are mean ± SEM for 22 litters of non-stressed control rats and 23 litters of prenatally stressed rats. The male offspring of these litters were used as the subjects for these experiments. Pups weights were determined at weaning so there was no disruption of dam-pup interactions.