Results 161 to 170 of about 3,713 (220)

Luteolysis in early diestrous beagle bitches

Theriogenology, 1988
To induce luteolysis early in diestrus, 15 mated beagles were treated with 250 microg/kg prostaglandin F2alpha (PG), administered subcutaneously twice daily for 4 d, from Day 5 to Day 8 after the onset of cytological diestrus. They were divided into three groups of five bitches each: Group 1 received PG only.
A Marais, H J Bertschinger, H J Bertschinger   +2 more
exaly   +3 more sources

The transition between preluteolysis and luteolysis in cattle

Theriogenology, 2011
Novel characterization of the transition between preluteolysis and luteolysis was done in seven heifers. Blood samples were collected hourly and assayed for progesterone (P4), 13-14-dihydro-15-keto-PGF2α (PGFM), and estradiol (E2). The peaks of P4 oscillations were used to designate the transitional hour in each heifer.
Mohd Amin Beg, H K Shrestha, H K Shrestha   +2 more
exaly   +3 more sources

Role of PGF2α in luteolysis based on inhibition of PGF2α synthesis in the mare [PDF]

Theriogenology, 2013
The effects of inhibition of PGF2α synthesis on luteolysis in mares and on the incidence of prolonged luteal activity were studied in controls and in a group treated with flunixin meglumine (FM), a PGF2α inhibitor (n = 6/group).
Mohd Amin Beg, M A Beg, O J Ginther
exaly   +2 more sources

Luteolysis

2018
Joy L Pate
exaly   +2 more sources

Luteolysis in Bos indicus cows on Days 5 and 7 of estrous cycle with varying doses of PGF2α [PDF]

Theriogenology, 2016
The aim of this study was to evaluate luteolysis using three doses of PGF2α on Day 5 or Day 7 of the estrous cycle in nonlactating Nellore (Bos indicus) cows. Cows (n = 323) were assigned within date of estrus (Day 0 of estrous cycle) to receive 12.5, 25.
Roberto Sartori, Alexandre Pires, Biehl M V   +2 more
exaly   +1 more source

Immunoregulation of luteolysis

Medical Hypotheses, 1988
It is proposed that the immune/inflammatory system plays a yet unrecognized role in the mechanics of prostaglandin (PG) F2 alpha-induced luteal regression. Eosinophils are specifically attracted into luteal tissues and activated to degranulate (i.e. secrete cytotoxins) before symptoms of luteolysis are manifested (sheep).
W J, Murdoch, L E, Steadman, E L, Belden
openaire   +2 more sources

ESTROGEN-INDUCED HUMAN LUTEOLYSIS

Obstetrical & Gynecological Survey, 1973
Diethylstilbestrol diphosphate (50 mg daily for 5 days) was given to 3 women for 5 treatment cycles beginning on the third day following the rise in basal body temperature. Daily plasma samples were obtained for radioimmunoassay of progesterone levels. In k treated cycles, a luteolytic effect was apparent by the third day of treatment.
B Z, Gore, B V, Caldwell, L, Speroff
openaire   +2 more sources

Studies on Prostaglandin and Luteolysis in the Pseudopregnant Rabbit

Endocrine Research, 1990
The ability of pulsatile infusion of prostaglandin F2 alpha (PGF2 alpha) or 13, 14-dihydro prostaglandin F2 alpha to induce corpus luteum regression was examined in the pseudopregnant rabbit. Each prostaglandin was infused in 5, 1-hour pulses (1 per 6 hours) during a 25-hour period starting day 9 or 10 of pseudopregnancy.
J C, Carlson, P, Hahn, K, So, A, Chan
openaire   +2 more sources

Induction of luteolysis by dihydrotestosterone in the pregnant rat

American Journal of Physiology-Endocrinology and Metabolism, 1981
A dihydrotestosterone (DHT) pellet (4 mg) inserted under each ovarian bursa on day 9 of pregnancy induced within 24 h, a 40% decline in serum progesterone (P) concentrations in rats; a further reduction was observed on days 12 and 15. Although P levels were significantly reduced by DHT treatment, fetuses remained alive on day 12.
R, Sridaran, G, Gibori
openaire   +2 more sources

Luteolysins and Mechanisms of Luteolysis

1987
A fundamentally important event in reproduction is luteolysis because without a decrease in progesterone secretion, there can be no gonadotropin-dependent ovarian differentiation and cyclic function. Until the last two decades, virtually nothing was known of the mechanisms of luteolysis or of the agents that regulate such processes.
H. R. Behrman, R. F. Aten, J. J. Ireland, L. K. Soodak, J. R. Pepperell, B. Musicki   +5 more
openaire   +1 more source