No offense, but what would make Caitlin an expert? She's not an OB-GYN, so how would she be able to tell if regular people can carry a child from a metahuman? Considering Central City has had metas for 7 years, I'm sure there are plenty who have gained more knowledge on this matter than Caitlin.
I hope when Iris gets pregnant, they don't say or show that Iris goes to Caitlin for her appointments. Again, she's not licensed for that. She also shouldn't have the materials needed any way. He'll, Caitlin shouldn't even have surgical equipment.