How does hypophysis do not have meeting

The pituitary gland is an endocrine gland, forming an endocrine hormone regulatory axis with thyroid, ovary, adrenal and other endocrine organs. If the pituitary gland does not exist, it cannot control the secretion of hormones by other endocrine organs; other endocrine organs will lack pituitary secretion hormones, resulting in secretion disorders, hypofunction or loss.