Will "endometriosis" be a good enough excuse?

Im sorry I just need some reassurance.

My bisalp surgery is coming up in a few months. Unfortunately it looks like I'll have to rely on my parents for transportation. We share the same home and I won't be able to hide that I was under anesthesia.

My parents don't know that I'm childfree. I don't feel comfortable telling them just yet, if ever. They mentioned multiple times how they want grandkids and give unwanted advice on raising children/caring for babies. So telling them "I need a ride back home after sterilization surgery" is completely off the table.

But I'm hoping that saying "The doctor is going to run a test to see if I have endometriosis" will be good enough for them to help me? That procedure seems quite similar to a bisalp. I'm not exactly how to bring up endometriosis to my parents though.

If you all have been in my situation and used endometriosis as an excuse, how did you talk about it? What's your experience with this? I appreciate any responses you have.