My sister began trying to have kids in her late twenties. She was 36 iirc when she finally had her only child. She has also miscarried multiple times.
She and I are no longer close, but we were at one time. We talked about the possibility of me serving as her surrogate if she couldn't have a child on her own.
Through her, I know quite a lot about fertility issues. I don't think I'm stretching anything. More like giving the nutshell version of many decades of knowledge.