Transuterine transport of small- and medium-sized molecules deposited in the uterus in gilts.

Radiolabelled compounds were mixed with seminal plasma and placed in the uterine lumen of anaesthetized gilts which were killed 5 min (N = 1) and 1 h (N = 2) later. After 1 h the distribution patterns of the 2 compounds placed in different horns were similar, indicating transuterine transport. Transuterine transport had begun by 5 min after deposition of seminal plasma. In all 3 gilts, the labelled substances had moved to the anterior segments of the oviduct.