Results 91 to 100 of about 8,097 (247)

Exacerbated conceptus signaling does not favor establishment of pregnancy in beef cattle

Journal of Animal Science and Biotechnology, 2018
Background Insufficient production of anti-luteolytic signals by the pre-attachment embryo is considered a major cause of pregnancy failure in cattle. We tested the hypothesis that transfer of multiple blastocysts (n = 5/recipient) and progesterone (P4 ...
T. Martins, M. Sponchiado, O. A. Ojeda-Rojas, A. M. Gonella-Diaza, E. O. S. Batista, B. O. Cardoso, C. C. Rocha, A. C. Basso, M. Binelli   +8 more
doaj   +1 more source

Luteal and placental function in the bitch: spatio-temporal changes in prolactin receptor (PRLr) expression at dioestrus, pregnancy and normal and induced parturition

Reproductive Biology and Endocrinology, 2011
Background Endocrine mechanisms governing canine reproductive function remain still obscure. Progesterone (P4) of luteal origin is required for maintenance of pregnancy.
Hoffmann Bernd, Guscetti Franco, Boos Alois, Gram Aykut, Michel Erika, Kowalewski Mariusz P, Aslan Selim, Reichler Iris   +7 more
doaj   +1 more source

Lymphatic Involvement in the Disappearance of Steroidogenic Cells from the Corpus Luteum during Luteolysis

PLoS ONE, 2014
In mammals, the corpus luteum (CL) is an essential endocrine gland for the establishment and maintenance of pregnancy. If pregnancy is not established, the CL regresses and disappears rapidly from the ovary.
Hironori Abe, M. Al-Zi'abi, F. Sekizawa, T. Acosta, D. Skarżyński, K. Okuda   +5 more
semanticscholar   +1 more source

Short communication: Heat stress does not affect induced luteolysis in Holstein cows

, 2020
Heat stress (HS) has deleterious effects on bovine reproduction, including prolongation of the luteal phase in Holstein cows, perhaps due to compromised luteolysis.
Vallejo, V. H. [UNESP], Nogueira, C. [UNESP], Mogollón, H. D.G. [UNESP], Ferrazza, R. A. [UNESP], Ochoa, J. C. [UNESP], Wiltbank, M. C., Carvalho, R. F. [UNESP], Sartori, R., Ferreira, J. C.P. [UNESP], Moraes, L. N. [UNESP], Rizzoto, G., Destro, F. C. [UNESP]   +11 more
core   +1 more source

Involvement of Src family of kinases and cAMP phosphodiesterase in the luteinizing hormone/chorionic gonadotropin receptor-mediated signaling in the corpus luteum of monkey

Reproductive Biology and Endocrinology, 2012
Background In higher primates, during non-pregnant cycles, it is indisputable that circulating LH is essential for maintenance of corpus luteum (CL) function.
Kunal Shah B, Killivalavan Asaithambi, Medhamurthy Rudraiah   +2 more
doaj   +1 more source

Oxidative Stress, Dietary Supplementation And Hypertensive Disorders In Pregnancy: A Review

Acta Medica Bulgarica
Objective. To provide an understanding of the effects of oxidative stress and hypertensive disorders during pregnancy and the significance of dietary supplementation in addressing the related adverse outcomes and complications.
Kirovakov Z.
doaj   +1 more source

Insights of structural and functional luteolytic pattern inTharparkar cows (Bos indicus) through doppler ultrasonography

Indian Journal of Animal Sciences
The study aimed to investigate real-time changes in intraluteal blood flow, progesterone (P4) profile, and associated structural alterations in the corpus luteum (CL) of Tharparkar cows following prostaglandin F2α (PGF2α) administration. Tharparkar cows
MOHAN GAWAI, BRIJESH KUMAR, SANJEEV MEHROTRA, UTTAM KUMAR SAHU, CHINMAY WARGHAT, MANOJ DONADKAR, PRADEEP CHANDRA, ATHIDI LOKAVYA, VANDANA, MK PATRA, SK SINGH, MH KHAN   +11 more
doaj   +1 more source

Effect of breeding season and age on follicular dynamics and hemodynamics in embryo donor mares subjected to luteolysis after embryo flushing

Open Veterinary Journal
Background: Mares are the only companion animal simulating women in the large diameter of their follicle, the effect of aging on reproduction and even mares are more sensitive to summer heat stress as they can sweat like human.
Jamal M.H. Alkhadrawy, Amal M. Aboelmaaty, Mostafa M. Abou-Ahmed, Abdelraouf M. Ghallab   +3 more
doaj   +1 more source

Efficiency of cloprostenol-induced luteolysis in superovulated cows.

, 2011
The objective of the first experiment was to compare the effi F, treatment on inducing luteolysis in embryo donors immediately after flushing (D7, superovulated with 400 TU of F of a single prostaglandin 24) or 4 days later (D11, N =22).
VIANA, J. H. M., SIQUEIRA, L. G. B., SOUZA, E. D., CAMARGO, L. S. de A., VARGAS, M. S. B., OLIVEIRA, A. P., ALVES, B. R. C.   +6 more
core  

Understanding how induced luteolysis in dairy cattle affect corpora lutea characteristics and fertility

, 2020
Efficient manipulation of estrous cycle via exogenous treatments is critical for fertility in dairy cows following timed artificial insemination (TAI) programs.
Minela, Thaina
core   +1 more source