I was chatting to my sister the other day about weaning - DD is 5 months and though I'm not planning to start until she's 6 I'm starting to think about it - and she was saying that as she had a nightmare with her DD (fell several centile bands when she started weaning, didn't take to it all etc) next time she's not going to start until the baby is 7/8 months.
So I was just wondering (idly, as I'm still planning to start at 6 months) - how long can you exclusively BF for? I had heard something about the baby's reserve of iron running out around 6 months but is this not true? At what point does BM NOT contain everything a growing baby needs??