From: In vivo assessment of number of milk duct orifices in lactating women and association with parameters in the mother and the infant
Male infants
Female infants
p
Left nipples
3.8 ± 1.7
3.8 ± 1.6
n.s.
Right nipples
4.2 ± 1.7
3.5 ± 1.4
0.030