Relative attraction to the odors of milk samples from different lactational stages.

<p>Box plot of the duration 2, 6, and 15 day-old (P2, P6 and P15) mouse pups spent oriented to: 1) milk of lactation day 2 (L2) <i>vs.</i> milk of lactation day 6 (L6), 2) milk of lactation day 2 (L2) <i>vs.</i> milk of lactation day 15 (L15), and 3) milk of lactation day 6 (L6) <i>vs.</i> milk of lactation day 15 (L15). The dashed line indicates the theoretical level of random orientation. Wilcoxon's tests: ** p<0.01, * p<0.05. The central square within the box is the median; the box encloses the interquartile range; whiskers show 1.5 times the interquartile range, “o” indicate outliers.