“…Although not statistically significant, Stainton, Jozza, and Fethney () reported a trend toward lowered stress levels and higher self regulatory behavior in cobedding twins and a larger effect with increasing duration of cobedding. Similarly, two recent reports examining the pain reactivity, infant regulation, and stress response of preterm twins who were cobedding compared to noncobedding twins, while undergoing a heel lance in the NICU demonstrated that cobedding twins exhibited a faster physiological recovery (time it took for heart rate and oxygen saturation levels to return to baseline) (Campbell‐Yeo et al., ) and a more tightly regulated salivary cortisol response when compared to a standard noncobedding condition (Campbell‐Yeo et al., 2014). In keeping with others examining the effect of close maternal contact provided through skin‐to‐skin contact with mothers, it may be possible that the close presence of the other twin enhances maturation of self regulatory behavior and modulates stress response (Feldman, Rosenthal, & Edelman, ).…”