Secretory activity of goat mammary glands during pregnancy and the onset of lactation.

The Journal of Physiology
I R FleetM Peaker

Abstract

1. The volume of the udder and the composition of the secretion have been followed in five goats through pregnancy to the onset of lactation. 2. During the middle of pregnancy udder volume was minimal and there was little or no fluid in the teats. 3. Two stages of commencing secretory activity (lactogenesis) were defined. In the first, starting up to ten weeks pre-partum, udder volume increased and the fluid in the teats changed from an extracellular-fluid-like to a milk-like composition and acquired a high concentration of immunoglobulins. Four goats accumulated several litres of a pre-colostral fluid with a high [lactose] 6-7 weeks pre-partum. 4. Comparison of the rate of increase in udder volume with previous data for the rate of increase in empty udder volume in pregnant goats showed that the rate of secretion, even in the last few days of pregnancy, was only a few per cent of the rate immediately after parturition. 5. In the last 2-3 days of pregnancy there was a three to elevenfold increase in [citrate] in the secretion; this heralded the onset of copious secretion at about the time of parturition. 6. The changes in mammary gland activities are discussed in relation to changes in plasma hormone concentrations during pregn...Continue Reading

Citations

Nov 20, 2013·Journal of Mammary Gland Biology and Neoplasia·Kerst Stelwagen, Kuljeet Singh
Oct 1, 1989·Domestic Animal Endocrinology·A J LukesR E Pearson
Nov 21, 2007·Journal of Mammary Gland Biology and Neoplasia·Wei Wei Pang, Peter E Hartmann
Jan 1, 1984·The International Journal of Biochemistry·L M SordilloS C Nickerson
Jan 1, 1983·The International Journal of Biochemistry·I M Zulak, T W Keenan
Jan 1, 1983·Comparative Biochemistry and Physiology. B, Comparative Biochemistry·R D Wiehle, J L Wittliff
Jun 16, 2010·Journal of Animal Physiology and Animal Nutrition·A PezeshkiC Burvenich
Jul 1, 1984·Equine Veterinary Journal·J C OuseyP D Rossdale
Mar 10, 2001·Pediatric Clinics of North America·M C NevilleS Umemura
Mar 23, 2012·Animal : an International Journal of Animal Bioscience·R J CollierA Pezeshki
Nov 11, 2014·Annual Review of Animal Biosciences·Nelson D Horseman, Robert J Collier
Jul 21, 2005·New Zealand Veterinary Journal·C G Brown-DouglasD I Hedderley
Feb 1, 1982·The Journal of Dairy Research·A Faulkner, M Peaker
Feb 1, 1987·Journal of Dairy Science·T B McFaddenG W Kazmer
Feb 1, 1980·Journal of Dairy Science·N J KuhnC J Wilde
Jun 1, 1989·Journal of Dairy Science·S P Oliver, L M Sordillo
Sep 1, 1988·Journal of Dairy Science·S P Oliver, L M Sordillo
Jun 1, 1981·Journal of Dairy Science·H A Tucker
Sep 13, 2002·Acta Obstetricia Et Gynecologica Scandinavica·Mark D CreganPeter E Hartmann
Feb 1, 1994·The Journal of Dairy Research·S C DoddR R Dils
Jul 14, 2000·Physiological Reviews·D B Shennan, M Peaker
Feb 24, 2001·Carbohydrate Research·Y Hara, K Suyama
Jan 1, 1984·Comparative Biochemistry and Physiology. C, Comparative Pharmacology and Toxicology·D R BlatchfordJ M White

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.