Evidence for relaxin and progesterone synchronous secretion on days 13 to 17 of the oestrous cycle in sows.
Concentrations of relaxin in both the utero-ovarian vein (UOV) and jugular vein (JV) as well as those of progesterone and prostaglandin F2 alpha in the UOV were studied on Days 13-17 of the oestrous cycle in sows. Mean relaxin plasma concentrations in the UOV and JV were correlated (r = 0.55; P less than 0.001) and were significantly higher (P less than 0.01) in the UOV (1.67 +/- 0.07 ng/ml), than in the JV (0.59 +/- 0.1 ng/ml). The great similarity between relaxin and progesterone profiles was ascertained (r = 0.57; P less than 0.001). The steep decrease of progesterone plasma concentration on the day of luteolysis was observed together with synchronous relaxin concentration decline. A significant correlation between relaxin and PGF2 alpha plasma concentration was demonstrated one day before luteolysis (r = 0.41; P less than 0.001).
Kotwica
G
G
Institute of Animal Physiology, University of Agriculture and Technology, Olsztyn-Kortowo, Poland.
Dusza
L
L
Ciereszko
R
R
Okrasa
S
S
Schams
D
D
D000818:Animals; D015237:Dinoprost / Q000097:blood* / Q000378:metabolism; D004971:Estrus; D005260:Female; D007601:Jugular Veins; D008183:Luteal Phase; D010053:Ovary / Q000098:blood supply; D011374:Progesterone / Q000097:blood* / Q000378:metabolism; D011863:Radioimmunoassay; D012065:Relaxin / Q000097:blood* / Q000378:metabolism; D013552:Swine; D014599:Uterus / Q000098:blood supply
D011374:Progesterone; D012065:Relaxin; D015237:Dinoprost