It depends on whether I want to play a baby or toddler. If I want to play a baby, I'll create a spouse in CAS and give her the ability to make others pregnant. If I want a toddler, I do the mixing genetics route. Since I'm playing a legacy, I want each generation to be the biological offspring of the last generation, so I don't go the adoption route. (Occasionally, I'll want to play serial toddlers, so I'll have a parent adopt toddlers and raise them to the kid stage, when they get shipped to the homestead for extra family members. I think of them as foster parents. Eventually, they get down to business and have their own kid.)
