Role of Olfactory Sense in Pregnancy Block by Strange Males

Science  20 May 1960:
Vol. 131, Issue 3412, pp. 1526
DOI: 10.1126/science.131.3412.1526


Pregnancy is blocked in a high proportion of recently mated female mice exposed to strange males. This reaction is virtually abolished by the prior removal of the olfactory bulbs of the female. The smell of the strange male appears to be the primary stimulus in the exteroceptive block to pregnancy in mice.