Fathers, Child Language Development and parenthood

Hmm, does this mean that it really is better, other things being equal, to have two parents, one of each sex?

The children whose fathers used more diverse vocabularies had greater language development when they were tested one year later. However, the mothers' vocabulary did not significantly affect a child's language skills.

ScienceDaily: Fathers Influence Child Language Development More Than Mothers: Filed in: children, development, language, linguistics, fathers, parenting, vocabulary