This immunofluorescence micrograph reveals plasma cells (green) scattered throughout the mammary gland at the end of gestation. These immune cells are thought to contribute to local immunoglobulin production, helping prepare the gland to deliver maternal antibodies through colostrum and milk. Although we are still desciphering their exact role, these cells likely hold part of the secret behind colostrum immune properties and its vital role in giving newborns the best possible start in life.
