The blessing of reproduction - R’ Breitowitz

most people assume that the source of the Mitzvah of PR Vu the Mitzvah to have children is Paras braus but there's a problem with that because that was even given to animals and therefore many Rim say that the pr vu in parad Braes is not a commandment it is a blessing from God that all types of life should be endowed with the capacity to reproduce and therefore it's not a Mitzvah it does not create an obligation the obligation is only in par Noah