How long did you wait after your first baby to try to conceive again?

Sheriana
Our baby girl will be 7 months old tomorrow! She was a preemie born at 32 weeks because I had a severe case of pre-eclampsia which turned into eclampsia and the doctors said I would most likely go through the same thing again which is scary. Because of this sickness and everything I went through my husband and I have decided to only have 1 more child, but he's ready to start trying to conceive again but I'm thinking it may be to early.