Hi Sarah,

I didn't have this query with Olivia till a lot later (11 months) as she was in her hammock which kept her on her back.

But a GF of mine, who has twins: her boys ALWAYS slept on their tummies. Understandably she was really worried about this, considering the SIDS recommendations, so asked around GP's and her pead about this, and they suggested that the SIDS risk does drop at approx. 4 months........

Not sure if this is any help to you.....