Before that, from conception to birth to 2 years, mother is much more important. Uninvolved fathers of America take note, you're off the hook until age 2. Appa

Before that, from conception to birth to 2 years, mother is much more important. Uninvolved fathers of America take note, you're off the hook until age 2. Apparently prior to that you don't really matter much anyway. </sarcasm>