Do you let random chance decide your sims' pregnancies, or do you cheat it with MCCC?

I don't have any mods or anything in my game but I just use the CAS cheat to change the baby as needed. It's 50/50, if I have a storyline planned around a certain birthing order then I'll change it but otherwise I just let it happen and work the story whatever I get. Just depends on what I'm doing.