Etherton, Terry D., and Dale E. Bauman. Biology of Somatotropin in Growth and Lactation of
Domestic Animals. Physiol. Rev. 78: 745–761, 1998.—Impressive progress has been made …

ABSTRACT A persistent lactation is dependent on maintaining the number and activity of
milk secreting cells with advancing lactation. When dairy cows are milked twice daily, the …

Abstract Effects of exogenous bovine somatotropin (bST) on dairy cows are reviewed. An
introductory section gives background information; further sections describe production …

When I was a beginning graduate student 41 yr ago it had been established that estrogen
caused mammary duct growth; a combination of estrogen and progesterone was required …

The growth and morphogenesis of mammaryparenchyma varies substantially between
species and isregulated by an array of systemic and local factors. Central to this regulation is …

Insulin-like growth factors (IGF) are important mediators of growth, lactation, reproduction,
and health. Considerable information on their role in ruminant animals has been learned in …

One hundred-sixteen Holstein heifers (mean BW, 175kg) were randomly assigned to diets of
alfalfa silage or corn silage and were fed to gain approximately 725 or 950 g/d in order to …

Growth hormone (GH) and prolactin (PRL) exert their regulatory functions in the mammary
gland by acting on specific receptors. Using isotopic in situ hybridization and …

Insulin-like growth factor (IGF)-I is thought to mediate a portion of the effects of bST on
lactation in dairy cows. Serum concentrations of IGF-I are increased in lactating cows that …

To study the involvement of the IGFs in mammary development and lactation of the cow, the
temporal expressions of IGF-I and-II, its receptor type 1 (IGFR-1), IGF-binding proteins …