>>26218159https://www.milkgenomics.org/?splash=do-larger-breasts-make-more-milk>The study reported a negative association between maternal BMI (body mass index), and the function of a gene that represents the milk-producing cells. >the large breasts of overweight or obese mothers contain more fat cells than milk-making cells>Therefore, breast size does not necessarily translate to more milk-producing cells or higher ability to make milk.>Interestingly, the change in breast size (breast volume) from pre-pregnancy to lactation can be an indicator of how well the breast performs during lactationI may be reading it incorrectly, or it may be wrong, but I think that maximum milk potential is based on the growth of milk-producing tissue over the course of pregnancy, not the absolute size of the breasts. So, a flat girl could produce a lot of milk, but only if her breasts grew throughout pregnancy. Interestingly, that study found that women with large breasts prior to pregnancy were less able to produce milk, so your oshi being flat pre-pregnancy may well work in her favour.
