Planet of the Dino-Men Series by Rowan Stone

When the escape pod from his doomed ship lands in a foggy jungle on an unexplored world, Billings finds himself alone and unable to contact the other members of his crew. As he searches for shelter, he is discovered by a massive humanoid triceratops, and learns that on this world mammals exist to serve as incubators for the planet's dominant dinosaur species. An oviposition mpreg short, from implantation to birth.

Stranded on a world dominated by humanoid dino-men, Clark stumbles into the camp of a massive stegosaurus-like native. His armored host takes him back to his village, where Clark finds himself the focus of a competition between the dino-men. .. a mating competition in which Clark himself is the prize.

After ejecting from his doomed ship, Fielding's escape pod is dragged wildly off-course by the planet's avian inhabitants. The scientist finds himself taken before the leader of the pterodactyl-like beings, and learns his new purpose on this strange, alien to serve as host for the avian dinosaur's eggs .