Elwood R W, Kennedy H F
Department of Biology, Queen's University, Belfast, Northern Ireland, United Kingdom.
Behav Neural Biol. 1990 Mar;53(2):277-83. doi: 10.1016/0163-1047(90)90526-c.
Newly pregnant mice are more likely to exhibit pregnancy block when females are exposed to infanticidal males rather than to noninfanticidal males. These data suggest that females are able to assess the risk to their future infants and adjust their reproductive tactic. Those females that did not exhibit pregnancy block in the presence of infanticidal males suffered a greater loss of pups than those in the presence of noninfanticidal males, demonstrating the advantage of pregnancy block. Females served by infanticidal or noninfanticidal males showed no difference in pregnancy block, but if the litter was produced, there was a greater loss of pups sired by infanticidal males.
当雌性怀孕小鼠接触杀婴雄性而非非杀婴雄性时，新怀孕的小鼠更有可能出现妊娠阻断。这些数据表明，雌性能够评估其未来幼崽面临的风险并调整其繁殖策略。那些在杀婴雄性存在时未出现妊娠阻断的雌性比在非杀婴雄性存在时的雌性损失了更多的幼崽，这证明了妊娠阻断的优势。由杀婴或非杀婴雄性交配的雌性在妊娠阻断方面没有差异，但如果产下幼崽，由杀婴雄性所生的幼崽损失更大。
