Table 1 Litter characteristics at gestation day 21

Extrauterine weight gain (g)

–

150 ± 5.27

141 ± 4.68

149 ± 4.36

150 ± 4.76

Total gestational food intake (g)

–

493 ± 12.6

473 ± 15.0

478 ± 14.3

496 ± 19.6

Total corpora lutea

–

14.3 ± 0.37

14.9 ± 0.45

14.0 ± 0.49

15.1 ± 0.63

Implantation sites per litter

–

12.7 ± 0.41

12.9 ± 0.42

13.1 ± 0.55

13.8 ± 0.56

Resorptions per litter

–

0.71 ± 0.22

0.73 ± 0.23

0.73 ± 0.25

0.94 ± 0.19

Full term fetuses

–

12.0 ± 0.38

12.1 ± 0.49

12.3 ± 0.47

12.9 ± 0.50

Percent males per litter

–

53.1 ± 2.49

51.1 ± 3.31

45.2 ± 4.40

49.5 ± 3.19

Total litters ^{excluding a,b,c}

14^a,b

15^c

15^b

16