I mostly recommend bringing a net projectile and let the female you want to impregnate your dino of choice (Brontos and Gigas can do the job) shoot her with a shotgun or any weapon of high damage and bring a primitive or any weapon with low damage so you can get her below 10% hp feed your sacrificial lamp a pheromone that you can get by killing a male Rhynio and lastly make sure you bring carving food and normal food in your creature's inventory because it will drain your creature's health, finally enjoy your new parasitic friend