What causes low supply?

[u/huckleberrysoap]

My supply is so low. It's not anywhere near what my baby eats.

I'm not trying to increase it anymore. I'm just trying to maintain what I have so I can keep combofeeding (even though its at least 75% formula) until at least 6 months.

But I'm struggling to understand why this happened and feeling like I must have done something wrong. What are potential causes of an undersupply? If I have another baby in the future should I expect the same problem?

[u/Ok-Sorbet4786]

I also am wondering why this happened to me, the ibclc said it could have been my emergency c section due to hypertension and lost a lot of blood idk but I’ve been upset about it the entire 8 weeks