Table 1.

Body weights (g, mean ± s.e.m.) of guinea pig dams during pregnancy

	Day of pregnancy
Prenatal treatment	30	35	40	45	50	55	60	65
Control (12)	767.4 ± 27.51	798.5 ± 25.62	838.9 ± 25.52	885.5 ± 27.61	951.4 ± 28.58	993.1 ± 36.05	1035.1 ± 38.48	1108.9 ± 40.85
PS50 (12)	781.0 ± 14.90	816.0 ± 16.93	856.0 ± 17.66	893.3 ± 17.62	960.8 ± 22.06	1008.0 ± 27.56	1043.4 ± 27.05	1122.6 ± 21.69
PS60 (9)	780.4 ± 22.83	821.0 ± 25.76	871.8 ± 27.72	912.8 ± 29.15	975.6 ± 35.57	1019.2 ± 40.30	1034.7 ± 48.07	1122.4 ± 49.48

Numbers in brackets indicate number of animals in each group.