The impact of induced stress during days 13 and 14 of pregnancy on the composition of allantoic fluid and conceptus development in sows.
Stress due to regrouping of breeding females is difficult to avoid completely in loose-housing systems. The effects of stress during the maternal recognition of pregnancy on fetal development and survival at Day 30 of pregnancy was, therefore, studied in 17 sows allocated into one control (C-) group, one group deprived of food during Days 13 and 14 (FD-), and one group (A-), which was treated with ACTH (0.01 mg/kg body weight of Synacthen Depot) every sixth hour during the same period. Total number of fetuses, fetal survival rate, volume of allantoic fluid, and the weight and length of total fetal unit, placentas, allantochorion and fetuses were determined. The concentrations of progesterone (P4), PGFM, PGF2, PGE, estrone-sulfate, and estradiol-17beta in the allantoic fluid were analyzed. No significant differences between groups were found for any parameter measured except for P4. Food deprivation increased P4 concentration in the allantoic fluid, and there was a positive correlation between the P4 concentration and the weight of the placenta. It is, therefore, suggested that P4 influences the placenta size among food-deprived sows.
Razdan
Pia
P
Department of Obstetrics and Gynaecology, Faculty of Veterinary Medicine, Centre for Reproductive Biology in Uppsala (CRU), Swedish University of Agricultural Sciences, SLU, P.O. Box 7039, SE-750 07 Uppsala, Sweden. pia.razdan@og.slu.se
Tummaruk
Padet
P
Kindahl
Hans
H
Rodriguez-Martinez
Heriberto
H
Hultén
Fredrik
F
Einarsson
Stig
S
D000482:Allantois; D000818:Animals; D001826:Body Fluids / Q000737:chemistry*; D015237:Dinoprost / Q000031:analogs & derivatives* / Q000032:analysis; D005314:Embryonic and Fetal Development; D004958:Estradiol / Q000032:analysis; D004970:Estrone / Q000031:analogs & derivatives* / Q000032:analysis; D005260:Female; D020567:Fetal Weight; D005865:Gestational Age; D009929:Organ Size; D010920:Placenta / Q000033:anatomy & histology; D011247:Pregnancy; D011248:Pregnancy Complications / Q000662:veterinary*; D011374:Progesterone / Q000032:analysis; D011458:Prostaglandins E / Q000032:analysis; D013312:Stress, Physiological / Q000662:veterinary*; D013552:Swine; D013553:Swine Diseases
D011458:Prostaglandins E; C008228:15-keto-13,14-dihydroprostaglandin F2alpha; D004970:Estrone; D011374:Progesterone; D004958:Estradiol; D015237:Dinoprost; C017296:estrone sulfate