TABLE 2.

Dam Weight Gain and Pregnancy Rates^a

Sidestream Smoke Exposure on Gestational Days 6–9
	Weight Gainb (g)c	No. of Dams Exposed	No. Pregnant	% Pregnant	No. of Dams Excluded for <4 Implantations
Folr2+/+ - Sham	0.9 ± 0.3d (9)	11	10	90.9	0
Folr2+/+ - CSE	0.3 ± 0.3 (8)	12	8	66.7	0
Folr2−/− - Sham	2.4 ± 0.2 (7)	18	14	77.8	5
Folr2−/− - CSE	1.2 ± 0.5e (8)	9	8	88.9	0

^aDams were weighed daily (gd 6–9) and pregnancy rates were assessed on day 10.5 of gestation.

^bDam weight gain data are reported as mean ± SEM (n = 7–9 dams per group).

^cIntegers inside the parenthesis indicate the number of dams per treatment group.

^dFolr2^+/+ sham-exposed dams gained less weight than Folr2^−/− sham-exposed dams (p < 0.05).

^eCigarette smoke-exposed Folr2^−/− dams gained less weight than Folr2^−/− sham-exposed dams (p < 0.05).