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Science 8 July 1983:
Vol. 221. no. 4606, pp. 186 - 188
DOI: 10.1126/science.6857281
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Articles

Science, Vol 221, Issue 4606, 186-188
Copyright © 1983 by American Association for the Advancement of Science

articles

Recognition of H-2 types in relation to the blocking of pregnancy in mice

K Yamazaki, GK Beauchamp, CJ Wysocki, J Bard, L Thomas, and EA Boyse

Inbred BALB/c females were mated and subsequently exposed in a divided cage to "stimulus" males or females whose H-2 type was similar or dissimilar to the stud male's. The incidence of pregnancy blocking was considerably higher when stud and stimulus males differed in H-2 type than when they did not. Similar results were obtained with urine samples of H-2 identical and nonidentical males. Females exposed after mating to other females whose H-2 type differed from the stud male, under the same experimental conditions, also showed an appreciable incidence of pregnancy block. It is therefore concluded that chemosensory recognition of H-2 types affects the reproductive hormonal status of the pregnant female.


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