Actually... Morale is a bit more complex then that... Hooman disected the morale.txt, his post is around here somewhere. Somebody wanna dig it up?
Anyway, yea, building "birth" adds a few points to morale. But there are many other factors that affect it as well. Really, all you NEED is residential demand under 100%, Medical Center demand under 100%, and a nursery, university.
Keep your people occupied. Do not let unoccupied colonist ratio rise above 10%
Gorf, Recration facility, Forum techs affect morale. If you don't reserch em, you don't have to worry about em.