mortality/aging
• the numbers of heterozygous mutants were underrepresented among weaned pups but did not observe death after birth, indicating that some embryos may have died during a late gestational stage
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growth/size/body
• heterozygous females exhibited a greater gain in body weight from 9 weeks of age to 26 weeks of age than in wildtype, but no differences in males
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reproductive system
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• the apical surface of the luminal epithelium in the uteri of estradiol treated females was more convoluted than the smooth apical surface in wildtype and showed luminal epithelium hyperproliferation
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• females treated with estradiol (E2) for 4 days had a 40% increase in uterine weight
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• exhibited larger litter sizes than on the 129S6/SvEvTac coisogenic background
• litter sizes of second-generation mice were reduced significantly from those of the first-generation mice (5.9 vs 7.5 pups)
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