[Demonstration of prenatal maternal influences by embryo transplantation in mice].
A comparison between inbred C57BL/6 Mice either transferred at an early developmental stage into the uterus of a hybrid female and then nursed by this mother, or only fostered to such a mother at birth, is performed in order to differentiate between uterine and postnatal maternal effects. At 21 days of age, animals from embryo transfer are heavier and display a greater amount of locomotor activity during a 48 hr period in a seminatural environment than crossfostered subjects. On the other hand, the L.D. distribution of this activity is not affected by the differences in development environments. The interest of such a methodology for the genetic analysis of behavioural differences related to differences in the environment during ontogeny is discussed.
D000818:Animals; D001835:Body Weight; D004624:Embryo Transfer; D005260:Female; D005838:Genotype; D006824:Hybridization, Genetic; D051379:Mice; D008807:Mice, Inbred BALB C / Q000502:physiology*; D008810:Mice, Inbred C57BL / Q000502:physiology*; D009035:Mothers; D009043:Motor Activity / Q000502:physiology; D011247:Pregnancy
Mise en évidence d'effets maternels pré-natals par transplantation d'embryons chez la Souris.