New study reveals sex differences in growth hormone regulation in rats.
The study looked at how genes related to growth and hormone control are active in the pituitary gland of young rats. They found that these genes are expressed at different times during development, suggesting they play specific roles in the gland's growth and function. The expression of these genes also varies between male and female rats. This shows that the insulin-like growth factor system is carefully controlled as the pituitary gland continues to grow after birth.