Periestrous and Midluteal Time Courses of Circulating LH, FSH, Prolactin, Estradiol-17β and Progesterone in the Domestic Pig

Abstract

Concentrations of LI-I, FSH, prolactin (PRL), estradiol-17 (E2), and progesterone (P) were measured in samples of peripheral blood, which were taken without stress from four intact pigs every hour for a 100 h period during the expected rime of estrus, and a 24 h period during Days 10 and 11 of the estrous cycle. Additional blood samples low frequency of blood sampling of one sample