“In the anterior pituitary, the substance P content was increased after progesterone , and this increase was blocked by EB.”
“In the trigeminal nucleus, the substance P content was increased after progesterone and EB, while only progesterone affected neurokinin A content.”
“Injection with EB decreased the plasma concentration of substance P at the time of the positive feed‐back exerted by EB on gonadotropin … no effect on the plasma concentration of neurokinin A. In the hypothalamus, EB injection enhanced the substance P and neurokinin A content, while progesterone … substance P ….”