All reduce lactation except -

early postpaum maternal anxiety is associated with reduced odds of exclusive breastfeeding at 6 months and any breastfeeding at 12 months When Inveed Nipples May Interfere With Breastfeeding That said, inveed nipples can make it more difficult for some women to breastfeed. In rare cases, a mother can experience persistent sore nipples because the baby compresses the buried nipple rather than compressing the milk ducts All mothers experience metabolic and hormonal changes after giving bih. A mother with diabetes who breastfeeds has an advantage as breastfeeding reduces the impact of these changes Ref Davidson 23rd edition pg 1270