Table 1: Comparison of the mean gestational age of research units per week in the three groups studied.

Studied groups	Number	Mean ± SD	Analysis of variance
Breast Milk Odor	30	38.89 ± 1.343	F = 0.87 df= 2.85 p= 0.42
Non-nutritious sucking	30	38.73 ± 1.048
Control	30	39.13 ± 1.137
Total	90	38.92 ± 1.17