Fire alarms and oestrus in rats.
Vaginal smear cyclicity was used as a physiological test to compare the response of rats to the new "silent" fire alarm developed by the Laboratory Animals Centre with a conventional fire bell. The fire bell had a highly significant effect on the vaginal smear cyclicity whereas the rats exposed to the "silent" fire alarm showed no significant changes from the control animals in quiet conditions.
D000818:Animals; D004971:Estrus; D005260:Female; D005390:Fires / Q000517:prevention & control; D009622:Noise; D011247:Pregnancy; D051381:Rats / Q000502:physiology*; D013997:Time Factors; D014626:Vaginal Smears