When u find a reaper if u want a easy way to get pregnant make a trap with foundations and pillars after you get it under 2k hp it will glow pink if you use a drake or megalosaurus then hop off out of biting distance of the reaper qait about 2-3 seconds until its looking at you and hop back on your tame and it will grab you and impregnate you since there are foundations the reaper will not bury itself this can be used to get multiple for your tribe or anyone after impregnation is done take a gun preferably a shotgun turn your light on and kill it with a gun or crossbow or whatever your using this will give your character the levels for the reaper caps at 75 btw you have to kill it with your character if you use a tame you will not get very much exp.
Lure a Reaper Queen into a metal trap WITH A COVERED FLOOR SO IT CANNOT ESCAPE AFTERWARDS, that way multiple people can get pregnant from 1 good Queen. These other beach noob comments forget that detail. Using glowpets to weaken her, damage her until she reaches 2k hp, preferably with a Megalo or Reaper, but Drakes work too. Turn the lights off and she'll glow pink, showing she's ready. Now dismount and stay just out of reach until she leans forward, at which point she'll try to pick you up and BAM you're pregnant. There's a Drake trick that works without dismounting, look it up. Use the next 12 hours to trap more Queens, finishing them off with a shotgun to get the most exp for the baby. Once time is up, encumber yourself with meat in a small room and let the baby kill you when it hatches. It'll take all the meat regardless of weight and you won't have to handfeed it at all, pheromones are worthless lmao. Use a crab to pick the baby up and it'll stay there until it hits juvenile.