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EFFECT OF INCREASED CARBON DIOXIDE IN INSPIRED AIR ON THE MORPHOLOGY OF SPERMATOZOA AND FERTILITY OF MICE

Summary.: Exposure of male mice to a 1·8/1·0 mixture of air/CO₂ for a total of 6 hr reduced the area and breadth of the head and of the midpiece of live spermatozoa in the vasa deferentia. During a total of 26 hr exposure spread over 6 days, males when test-mated had a low conception rate but the numbers of offspring in the litters produced were normal. The low conception rate of males appeared to persist even 15 days after the end of treatment.