Based on forehead-rump length, growth rates of mule deer (Odocoileus hemionus) fetuses in Piceance Basin, Colorado, were slower during severe winters than during moderate ones. Growth rates in both situations were slower than reported for both mule deer and white-tailed deer (Odocoileus virginianus) fetuses from captive does.
Bartmann, Richard M.
"Growth rates of mule deer fetuses under different winter conditions,"
Great Basin Naturalist: Vol. 46
, Article 10.
Available at: http://scholarsarchive.byu.edu/gbn/vol46/iss2/10