I know breastfeeding can be difficult
Or, in some cases, and with certain risk factors health-wise, literally not possible (or a massively reduced output despite the demand being there).
For some, it's not a "decision".
Speaking as someone who didn't "decide" to combi feed - but had to. Health conditions meant I couldn't produce anywhere near enough for my baby's needs (despite medical intervention, consultation with midwives and a private lactation consultant, prescription drugs, medical staff, and post-natal support) etc.. we did our best for many months, but the amount I was able to produce and pump was 1oz on a "good feed" when we measured it in a weighted feed (yes, that's 30ml, tops, on GREAT days where I was hydrated, eaten buckets of oats, taken my domperidone pills, etc).
I would urge posters to think of others like me - I'm in a stable job, supportive husband, middle class, very lefty liberal, wear swishy skirts, mumsnet posting stereotype mum (
)... but despite fitting the stereotype of being a breastfeeding warrior, it just couldn't happen fully. And that's ok. from support forums i found online, there are more women similar to me than i think most other people realised.
i come from a line of breastfeeding mums/friends, and not a single one had previously heard of a failure of lactogenesis stage 2 (your milk "coming in"), yet online research and medical support after DC's birth suggested i'm not some sort of freak of nature, some women cannot physically breastfeed, or produce so little as to be unviable.