Endogenous insulin is present in human milk. Insulin orally ingested is degraded in the gastrointestinal tract . No adverse reactions have been associated with infant exposure to insulin through the consumption of human milk. In a study of eight preterm infants between 26 to 30 weeks gestation , enteral administration of Humulin R (insulin (human recombinant)) did not result in hypoglycemia. Good glucose control supports lactation in patients with diabetes. Patients with diabetes who are lactating may require adjustments in insulin dose and/or diet.
Proper pipetting posture is the most important element in establishing good ergonomic work practices.  During repetitive tasks such as pipetting, maintaining body positions that provide a maximum of strength with the least amount of muscular stress is important to minimize the risk of injury. A number of common pipetting techniques have been identified as potentially hazardous due to biomechanical stress factors. Recommendations for corrective pipetting actions, made by various US governmental agencies and ergonomics experts, are presented below.