PMID: 9526684Apr 4, 1998Paper

Perinatal stimulation facilitates suckling onset in newborn rats

Developmental Psychobiology
R A AbelJ R Alberts

Abstract

The fetus' experience of birth derives from a sequence of stimulation provided by the mother's labor contractions, her licking and handling, and the contrasting environmental conditions of the uterus and outside world. In the present investigation, Day 21 fetal rats were externalized from the dam's body; subjects in one uterine horn were compressed by simulated uterine contractions while control subjects in the opposite horn were not compressed. All pups were Cesarean-delivered, stroked, and exposed to a thermal environment simulating either room (21 degrees C), nest (33 degrees C), or intrauterine (36 degrees C) temperature. After 1-hr exposure to the experimental temperature, all pups were maintained at 33 degrees C and tested for their suckling response to an anesthetized dam. When newborns were tested at 120 min postpartum, simulated contractions increased the probability of nipple attachment in pups exposed to 21 degrees C relative to noncompressed littermates maintained at the same temperature. Atypically warm postpartum conditions (nestlike or intrauterine) obviated the effects of compression by increasing suckling above the levels seen in noncompressed newborns exposed to the cool condition. Thus, compressions facilitat...Continue Reading

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Citations

Jan 5, 2007·Behavioral Neuroscience·April E RoncaJeffrey R Alberts
Aug 6, 2011·Biological Reviews of the Cambridge Philosophical Society·Matthew J HydePaul R Kemp
Oct 12, 2012·International Journal of Pediatrics·Jeffrey R Alberts, April E Ronca
Sep 16, 2006·American Journal of Respiratory and Critical Care Medicine·Jun RenJohn J Greer
Aug 7, 2008·Developmental Psychobiology·Stacie S Miller, Norman E Spear
Oct 6, 2012·Early Human Development·Matthew James Hyde, Neena Modi
Mar 30, 2012·The American Journal of Clinical Nutrition·Emily PriorMatthew J Hyde
Nov 5, 2020·Journal of Neuroendocrinology·William Kenkel
Jul 23, 2018·Current Opinion in Neurobiology·Françoise Muscatelli, Sébastien Gc Bouret

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