Waiting to go under the knife because I don't have kid?

I'm 28 I'm struggling with my weight and would like professional help from a plastic surgeon. 5"7 179lbs. I don't have any kids. I'm not sure if I should just wait until maybe after if I want kids or should just do what makes me happy at the moment. Yes, I'm in a strong committed relationship. He's great but, I don't think I want kids. Maybe later, I think.

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