Table 1.
Mean (± SEM) percent maternal weight gain, prenatal mortality and offspring weight at c-section. Sample size is shown in parentheses under treatment for each strain
| ISS | B6 | 129 | C3H | A | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| E | MD | E | MD | E | MD | E | MD | E | MD | |
| (15) | (13) | (13) | (12) | (10) | (13) | (13) | (13) | (11) | (10) | |
| PMWGA | 33(2) | 31(3) | 41(11) | 62(4) | 48(3) | 51(2) | 40(3) | 43(4) | 47(4) | 52(4) |
| APMWGB | 18(1) | 16(1) | 21(2) | 24(2) | 15(2) | 16(1) | 22(2) | 22(2) | 20(2) | 20(2) |
| PNMC | 23(5) | 16(5) | 11(3) | 3(1) | 16(5) | 4(2) | 38(6) | 34(6) | 23(6) | 19(5) |
| ♀ CSWTD | .90(.03) | .94(.03) | 1.04(.03) | 1.16(.08) | 1.18(.02) | 1.20(.02) | 1.06(.04) | 1.13(.06) | .82(.03) | .89(.06) |
| ♂ CSWT | .87(.03) | .95(.04) | 1.06(.03) | 1.19(.03) | 1.24(.02) | 1.20(.03) | 1.10(.04) | 1.15 (.02) | .86(.04) | .93(.03) |
Percent maternal weight gain = (weight day 18 – weight day 9)/weight day 9. ISS put on less weight than all strains except C3H (p’s < .01).
Adjusted percent maternal weight gain = (weight day 18 – weight day 9 – fetal weight)/weight day 8.
Prenatal mortality = [(resorptions + dead)/implantation sites] × 100. C3H mice had greater PNM than B6, 129 (p’s < .001) and ISS (p < .03); E-treated dams had greater PNM than MD-treated dams, p < .03.
Weight at c-section. A fetuses weighed less than all other strains except ISS, p’s < .001; E-exposed fetuses weighed less than MD-exposed fetuses, p < .001.