Physiology One of the most impoant cytokines causing fever is Interleukin 1 also called Leucocyte. Hormone for breast milk feeding is: A Oxytocin B Prolactin C Galactogen D GH 💡 Explanation One of the most impoant cytokines causing fever is Interleukin 1 also called Leucocyte. Hormone for breast milk feeding is: ✓ Correct Answer: A. Oxytocin