Abstract
Summary
In the experiments herein reported vaginal smears have been utilized in determining the proper time for mating golden hamsters. A male hamster is placed in the cage with each female hamster which is found to be in either proestrus or estrus upon inspection of its vaginal smear. The male is caged with the female for 48 hours and is then removed. Injury due to unsocial behavior of the animals is minimized by this procedure. Forty-nine pregnancies were secured from a total of 98 matings in the present experiments. One pregnancy in 2 matings is considered to be a satisfactory conception rate for this animal under laboratory conditions.
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