Oftedal theory for Duration of lactation and neonatal growth of mammalian species

  • Hernandez Eunice
Keywords: Lactation, neonatal growth, mammalian species, Evolution


The evolutionary origin of the mammary gland has been difficult to establish because little knowledge can be gained on the origin of soft tissue organs from fossil evidence. Although other animals such as pigeons, sharks, salamanders and skinks can nourish their young from various bodily secretions, mammals are the only animals that secrete a complex nutritive and protective fluid from complicated skin glands to provide the sole source of nourishment for the growth, development and protection for either their hatchlings or neonates.