The breeding season of the opossum (_Didelphis virginiana_) and the rate of intrauterine and postnatal development. [Please select]
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The corpus luteum of oviparous reptiles seems to be closely associated with the intrauterine life of the eggs and, in viviparous reptiles, it may be an important factor in maintaining optimum gestational environment; however, its functions in all reptiles are poorly understood (Miller, 1948:200-201). [Please select]
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