title: THE EFFECT OF ADVANCE IN LACTATION AND GESTATION ON MAMMARY ACTIVITY.
abstract: The rate of milk secretion in farrow cows may be expressed as See PDF for Equation, in which y = yield and t = time from calving. Pregnancy causes a decrease in yield which may be expressed as See PDF for Equation, in which i = inhibition or decrease in yield and p = time from conception. The constant K appears to be the same for various groups but b is roughly proportional to a. The decrease in yield associated with pregnancy is interpreted as due to a hormone. The hormone hypothesis also affords an interpretation of the increasing rate of milk secretion which occurs for a short time following parturition.
authors.affiliation: Department of Dairy Husbandry, University of Illinois, Urbana.
authors.forename: W L
authors.initials: WL
authors.lastname: Gaines
authors.forename: F A
authors.initials: FA
authors.lastname: Davidson