HF (msec²)

LF/HF (msec²)

At Rest

During Nursing

At Rest

During Nursing

Postpartum Day 1

Mean ± SD

2.54 ± 0.43

2.26 ± 0.36

2.24 ± 1.12

2.72 ± 1.06

t-value

−1.015

0.549

p-value

0.368

0.612

Postpartum Day 2

Mean ± SD

2.61 ± 0.42

2.09 ± 0.38

2.18 ± 1.93

3.77 ± 2.39

t-value

−2.107

2.007

p-value

0.103

0.115

Postpartum Day 3

Mean ± SD

2.70 ± 0.34

2.05 ± 0.54

2.20 ± 1.60

3.02 ± 1.24

t-value

−2.625

1.282

p-value

0.059

0.269