Conceptus development after vascular occlusion of the middle uterine artery in the pig

The middle uterine artery of gilts was occluded unilaterally or bilaterally from Days 25 to 70 after mating. The results showed that vascular occlusion of one (N = 7) or both (N = 6) middle uterine arteries during mid-pregnancy markedly reduced, compared with sham-operated controls (N = 7), development of the conceptuses and decreased peripheral oestrogen (oestrone + oestradiol-17 beta) concentrations in maternal blood.