A Baby Should Have One Bath Everyday And If Strong ‘He’ May Have Two In The Above Sentence The Personal Pronoun ‘He’ Refers To:?

I would say 'sex is unknown'. In fact, there is no question of sex here. It refers to the babies in general(indefinite article). It is not essential that the baby is a male. Consider this:
A President has many duties. He has to control the army.

This doesn't imply that the President is a male. Same is the case here.

Prajwal

1 male child