Fig. 2From: Factors contributing to the swimmer puppy syndrome found in Labrador retrieversThe correlation between the body weight and the number of litters. The swimmer puppy was indicated by a black circle (n = 16), and the non-symptomatic puppy was indicated by a gray circle (n = 420). The regression line for the body weight and the litter size was calculated and shown in the figure with the formulaBack to article page