I had 23 months between my two girls and it has been a roller coaster ride with my older one, but I'm thankful I didn't wait until now (3 yrs). When Loren was born Gracyn wasn't very interested at all in the new arrival and seemed to take it in her stride, she never woke when Loren woke during the night and never seemed at all interested in babies. Although she was there for the birth and was excited about mummy and baby, yet she was still a baby herself. Now Gracyn is fascinated in babies and the complete opposite to how she was. She also is very demanding for attention and fights like cat and dog with her sister. I'm glad I don't have a new born at the age she is now. I think it's all up to the individual, in my case I think a 3 year age gap would have been too long and harder for Gracyn to adapt to a new arrival especially because she is very close to both mum and dad.
Susan,NZ,3 yr old,1yr old littlies