Morphometric peculiarities of the development of ╬esophagostomum dentatum Rudolphi, 1803 from egg to infective larva were studied under laboratory conditions at various temperatures. The determined optimum temperature for embryonic and postembryonic development of ╬. dentatum larvae from domestic pig (Sus scrofa domesticus Linnaeus, 1758) is 22 ░Đ. At this temperature, 81 % of larvae develop to the third stage (L3) on the 10th day. Temperatures of 24 ░Đ and 20 ░Đ are less favorable for the development of the nematode, at those temperatures only 67 and 63 % of larvae, respectively, reached infective stage by the 10th day of cultivation. Embryonic development of ╬. dentatum eggs is characterized by their lengthening (by 8.87ľ9.50 %, < 0.01) and widening (by 6.77ľ9.35 %, < 0.05ľ0.01), and post-embryonic larval development is associated with lengthening (by 4.59ľ17.33 %, < 0.01ľ0.001).