Who was the father of roz baby on frasier?

The father of Roz's baby, Alice, on "Frasier" is a character named P. D. (short for "Piggy Dog"), but he is not a central figure in the series. Roz's pregnancy is primarily a subplot, and the identity of the father is not a major focus in the show. The series emphasizes Roz's journey as a single mother rather than her relationship with the baby's father.