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Differences in the conception rate of the female han nmri mouse influence of the evening and the morning mating


Zeitschrift fuer Versuchstierkunde 24(3): 161-164
Differences in the conception rate of the female han nmri mouse influence of the evening and the morning mating
Groups of 9 wk old Han:NMRI mice, maintained under standardized conditions, were mated (4:1) at 1 of 2 different daytimes (0700-0900 h; 1900-2100 h). Copulation, pregnancy rate (13.4%) and fertility rate (88.3%) were always higher in the morning at the dark to light transition as compared to evening mating (2.9%; 41.2%). Seasonal variations were observed but could not be statistically manifested.


Accession: 005151170



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