I am doing a rule that if you get pregnant with a dragon you lay a true dragon egg. Would the location of the egg be the same place in the human as the dragon or would it be in the normal place.
I don't think you need to worry about it that deeply as to get into the anatomy of it. As long as the egg comes from the person, that's as much as you need story-wise.
Humans and human-like creatures aren't suited to hard shell pregnancies, nor are they suited to becoming pregnant by a dragon in dragon shape. If the dragon is capable of taking on a humanoid form, then the offspring should be born as a humanoid and either revert to a dragon form shortly after birth, or learn of their true nature some time later.
If the dragon or humanoid are mated due to some temporary magical means, then that would reasonably result in the equivalent of magical infertility.
If you want to allow for non-traditional pregnancy, then I'd double down on the magical nature of the union and bypass the question altogether. The character fades to black (either knocked unconscious or falls asleep) and when they wake, there is an egg that they feel strongly connected to. Maybe if the dragon is connected to fire, the character feels a compulsion to touch a hot flame, and when they do, the ash from the fire coalesces into an egg. Let everything complicated happen externally.
I am doing a rule that if you get pregnant with a dragon you lay a true dragon egg. Would the location of the egg be the same place in the human as the dragon or would it be in the normal place.
I don't think you need to worry about it that deeply as to get into the anatomy of it. As long as the egg comes from the person, that's as much as you need story-wise.
Humans and human-like creatures aren't suited to hard shell pregnancies, nor are they suited to becoming pregnant by a dragon in dragon shape. If the dragon is capable of taking on a humanoid form, then the offspring should be born as a humanoid and either revert to a dragon form shortly after birth, or learn of their true nature some time later.
If the dragon or humanoid are mated due to some temporary magical means, then that would reasonably result in the equivalent of magical infertility.
If you want to allow for non-traditional pregnancy, then I'd double down on the magical nature of the union and bypass the question altogether. The character fades to black (either knocked unconscious or falls asleep) and when they wake, there is an egg that they feel strongly connected to. Maybe if the dragon is connected to fire, the character feels a compulsion to touch a hot flame, and when they do, the ash from the fire coalesces into an egg. Let everything complicated happen externally.