The study is devoted to a comparative assessment of the constancy and stability of lactation in Saanen goats and local goats bred in the Budjak terrain of the Republic of Moldova. It was found that the average coefficient of lactation constancy in goats of the Saanen breed during the experimental period was 82.8%, and in goats of the local breed - 51.4%. At the same time, the coefficient of lactation stability in both breeds did not differ significantly and was at the level of 88 - 90%. Analysis of the milk productivity indicator in the context of lactation periods revealed that the second period of lactation in relation to the first was milkier and showed a significant increase in both groups of animals - 113.6% and 110.5%, respectively. In the final period of lactation, a significant natural decrease in milk yield was observed in both studied breeds. However, in Saanen goats this inverse dynamics was less sharp (-29.11%) compared to goats of the local population (-42.45). The results obtained can be taken into account when developing recommendations for organizing targeted selection and breeding work to enhance the productive potential of goats in the region.