[HTML][HTML] Luteal prostaglandins: mechanisms regulating luteal survival and demise in ruminants

JL Pate, CHK Hughes - animal, 2023 - Elsevier
… on prostaglandins in luteal function of cattle and sheep. Due … over time were regulated by
estradiol, TNF and protein kinase … process rather than a factor-mediated event”. The purpose of …

Influence of preovulatory estradiol treatment on the maintenance of pregnancy in beef cattle receiving in vivo produced embryos

JN Ketchum, GA Perry, LK Quail, KM Epperson… - Animal Reproduction …, 2023 - Elsevier
… determine the effect of exogenous estradiol administration, at GnRH induced ovulation,
on … estradiol on pregnancy rate is likely mediated by increasing embryo/early fetal survival. …

Oxytocin-induced prostaglandin F2-alpha release is low in early bovine pregnancy but increases during the second month of pregnancy

JN Drum, MC Wiltbank, PLJ Monteiro Jr… - Biology of …, 2020 - academic.oup.com
… 11 and 18, lower than all days from day 25 to 60 of pregnancy. Oxytocin-induced PGFM
in P cows on day 25 was greater than P cows on day 18 (2.9-fold). However, oxytocin-…

Maintenance of pregnancy and parturition

J Phung, J Paul, R Smith - Maternal-fetal and neonatal endocrinology, 2020 - Elsevier
Estrogen and progesterone mediate changes to the … In sheep, active conversion of
progesterone to estrogen via 17α-… in the regulation of prostaglandins during pregnancy. Studies …

Impacts of estradiol on PGF2αrelease and corpus luteum function during early pregnant in beef heifers

IG Motta - teses.usp.br
… phases, induced by cyclical reproductive events mediated by … In an oppositive effect of
PGF2α, prostaglandin E2 (PGE2) is … secreted by the placenta and uterus of the cow and ewe on …

A Subovulatory Dose of Human Chorionic Gonadotropin (hCG) May Sustain Terminal Follicle Development and Reproductive Efficiency during Anestrus in Sheep

JF Cox, A Carrasco, F Navarrete, A Bocic, F Saravia… - Animals, 2024 - mdpi.com
… in sheep [7,8]. Most probably, any influence of the photoperiod on the number of recruited
follicles could be mediated by the ability of estradiol … to GnRH was induced in a population of …

Effect of protected fatty acid supplementation on ovarian activity, reproductive hormone profiles and reproduction of Barki ewes under semiarid conditions

B Farrag, KA El-Bahrawy, HA Shedeed… - Archives Animal …, 2024 - aab.copernicus.org
prostaglandin had a positive effect on ovarian follicles, as indicated by the large-sized follicles
(≥5 mm), which were significantly higher in ewes … higher plasma estradiol concentrations …

The hormonal control of parturition

E Hamburg-Shields, S Mesiano - Physiological Reviews, 2024 - journals.physiology.org
… cells that produce factors, especially prostaglandins (PGs), that … P450c17-mediated metabolic
of 360 P4 is converted by sheep … is coordinated with systemic estrogen 363 activation. 364 …

Early pregnancy regulates the expression of prolactin and its receptor in the thymus, the liver, the spleen and lymph nodes in sheep

P Feng, J Wu, Y Ren, L Zhang, J Cao, L Yang - Domestic Animal …, 2022 - Elsevier
… migrate to lymph nodes, the spleen and the liver to mediate immune responses [12]. During
… , which are induced by intraperitoneal PRL administration in female rats [45]. The estrogen-…

Expression of steroidogenic enzymes in placentome of ewes with pregnancy toxemia after two parturition induction methods

G Özalp, CT Ortaç, B Bozkurt… - Journal of the …, 2023 - ejournals.epublishing.ekt.gr
… in placental steroidogenesis and prostaglandin production in ewes with pregnancy toxemia
is … in estrogen synthesis (Lye, 1994; Palliser et al., 2006). Myometrial contractility is mediated