Some women with hypoplastic breast tissue do find that even with good support though, they are unable to create enough milk for their babies and may need to supplement their milk. (breastfeeding-babies.com)
This can be very frequent breastfeeding schedule, and many mothers with hypoplastic breast tissue find themselves breastfeeding hourly and sometimes more frequently, particularly in the afternoon. (breastfeeding-babies.com)
In the case of thyroid disorders, PCOS and tubular hypoplastic breasts though (and sometimes for no apparent reason) you may not have enough milk. (breastfeeding-babies.com)