it takes a year for your body to recover either way. it can actually put stress on your body if you don't wait long enough between kids. Not trying to be rude or anything if you want kids close together then go for it, but it can take a toll on your body.
my baby is only 3 months but I plan on waiting...want to enjoy her as much as I can right now. if I did get pregnant now I'm sure it would be fine because by the time I would have the next one it would hit a year but my peanut is enough for me right now.