It's really up to you and your DP. My DS and DD are 18 months and there will be 15 months between DD and this bub. DS and DD totally adore each other. I am really happy I had them close together, I love the small age gap. Having said that it is alot of work. My DH has had to help ALOT with the kids, housework and the night wakings. We want them all close in age hence going for number 3 quickly. I am so tired sometimes I feel like I'm going to drop but I wouldn't change it for the world. When things are really bad I think my friends will still have babies and having to get up at night ect and mine will be older and sleeping through - it always helps a little .