PMID: 6540458Mar 1, 1984Paper

Changes in responsiveness to newborn pups in pregnant, nulliparous golden hamsters

Physiology & Behavior
J D BuntinR D Lisk

Abstract

Virgin female hamsters were mated and tested once daily for maternal retrieving behavior beginning on days 0, 5, 9, 13, 15, of the 16 day gestation period to determine if responsiveness toward newborn pups changes as pregnancy proceeds. Upon initial exposure to 3 newborn pups, only a small percentage of early-to-mid-pregnant females exhibited maternal retrieving behavior spontaneously. In contrast, over half of the 15 day pregnant females displayed retrieving during the first test. Despite the high frequency of initial pup-directed aggression and cannibalism, maternal retrieval was induced in the majority of the females in all groups by repeated daily exposure to 3 newborn pups. However, no significant differences were observed in the number of pup exposure periods required to induce maternal retrieving in 0, 5, and 9 day pregnant females. It is concluded that the high level of maternal responsiveness observed in the parturient hamster develops somewhat abruptly during late pregnancy. In this respect, the pattern observed in the hamster differs from the more gradual increase in maternal responsiveness reported in mid-to-late-pregnant mice and rats.

References

Sep 1, 1975·Journal of Comparative and Physiological Psychology·J S Rosenblatt, H I Siegel
Sep 1, 1975·Hormones and Behavior·H I Siegel, J S Rosenblatt
Oct 1, 1974·The Journal of Endocrinology·R Baranczuk, G S Greenwald
Jan 1, 1980·Neuroscience and Biobehavioral Reviews·H I Siegel, J S Rosenblatt

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Citations

Sep 23, 2010·Archives of Women's Mental Health·Rebecca M PearsonJonathan Evans
Jan 1, 1994·Physiology & Behavior·M M McCarthyH I Siegel
Aug 15, 2000·Neuroscience and Biobehavioral Reviews·J S Lonstein, G J De Vries
Dec 28, 2010·Infant Behavior & Development·R M PearsonJ Evans

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