Hello
For those who want to break the Uterus protection: firstly, you can't get pregnant until you've killed the first boss
Two possibilities: either before the first boss you attract three goblins to you, and leave the game running in the background. The goblins will take 3 points of protection each time you have sex, and reach 50 (you can't go below this before the first boss)
Then, after you've killed the first boss, the girl with the sceptre will tell you to be careful, as you're no longer protected by her magic, so you can get pregnant.
Or, after you've killed the first boss, you can repeat the goblin technique (the aim being to get as many monsters on you as possible) and the protection will break down on its own.
Once below 50, it's good to go.