Yeah it's an interesting subject I think. I was told that some of the hormones that your body produces when pregnant can have an affect on milk let down. I don't know how true it is, but it obviously isn't with some mothers and maybe is true with others, but I definately noticed a huge change in my milk let down. But I did go on the mini pill for 1 month, maybe that had something to do with it as well. But either way it is definately possible to fall pregnant again straight away. Though they say not to "practise" for at least 6 weeks after giving birth. How early do you and your partner plan to start trying?