Warning: the following contains SPOILERS for 1883.Does Elsa get pregnant in 1883? The Yellowstone prequel never clarified whether Elsa (Isabel May) and Ennis (Eric Nelsen) consummating their relationship in 1883 season 1, episode 5 “The Fangs of Freedom" resulted in Elsa getting pregnant. Because it happened within earshot of the camp, the deed was heard by Elsa's mother Margaret (Faith Hill), who spoke with Elsa about actions and consequences the next day. Indeed, as there are no condoms or any other reliable form of birth control in the frontier, there's a real possibility that Ennis really did impregnate Elsa.
https://screenrant.com/1883-elsa-dutton-baby-pregnant-explained/