Personally I prefer not to have too close gap , gap of 2 - 3 will be good as then I don't miss each of their first 3 years . If too close , attention diverted . Now my elder gal very guai , she know I got bb and so more tired easier and help me a lot , read story to her younger sis aged 3 , bath her , play with her , help me fold clothes etc . For the 3 years old that one sigh , always want mummy and want me to carry , play with her when at times I so tired after a day of work . If I don't play with her , she will cry unlike the elder one will play , read on her own instead .