Estrus-associated glycoprotein (EGP) is a special protein in oviductal fluid which appears before ovulation and fertilization and disappears after the embryo passes into the uterus.

• 人们对输卵管液的成分已进行了初步研究，其中发情相关糖蛋白（EGP）是被研究的成分之一。 EGP仅存在在排卵核受精前后的输卵管液中。