Moore C L, Power K L
Dev Psychobiol. 1986 May;19(3):235-45. doi: 10.1002/dev.420190309.
Pregnant Long-Evans rats were stressed by crowding, and subsequent mother-infant interactions were described after cross-fostering. Prenatally stressed pups elicited less maternal licking from unstressed foster dams than controls, and previously stressed dams licked unstressed foster pups less than controls. No other differences in mother-infant interactions were detected. Adult offspring reared by foster dams that were stressed during pregnancy were more active in an open field than controls, but prenatally stressed and unstressed animals reared by control dams did not differ. Thus, stress during pregnancy can alter the maternal behavior of stressed dams, and the differential maternal stimulation can affect adult open-field behavior. Because prenatally stressed pups elicit different maternal care, cross-fostering does not eliminate the possibility that maternal stimulation may mediate some prenatal stress effects.
将怀孕的Long-Evans大鼠置于拥挤环境中使其产生应激反应，之后在交叉寄养后描述母婴之间的后续互动情况。与对照组相比，产前受到应激的幼崽从无应激的寄养母鼠那里得到的母性舔舐更少，而之前受到应激的母鼠对无应激的寄养幼崽的舔舐也比对照组少。未检测到母婴互动中的其他差异。由孕期受到应激的寄养母鼠抚养长大的成年后代在旷场中比对照组更活跃，但由对照母鼠抚养的产前应激和无应激的动物之间没有差异。因此，孕期应激会改变受应激母鼠的母性行为，而不同的母性刺激会影响成年后的旷场行为。由于产前受到应激的幼崽会引发不同的母性照料，交叉寄养并不能排除母性刺激可能介导某些产前应激影响的可能性。
