mortality/aging
• early blastocysts are present at E3.5 (17% versus expected 25%, n=18); no homozygous embryos are recovered at E7.5
• however, excess resorption sites suggest that embryos elicit a decidual response in vivo
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reproductive system
• in vitro, blastocysts hatch from the zona pellucida but form irregular outgrowths after 3 days in culture
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