I had IVF after 14 years of an ED. They did weigh me and I had to unofficially gain a lot in 6 months beforehand or I wouldn’t be eligible to do it. I had to switch off that ED voice send try to turn up the fertility voice. I found actually telling people about the medication I was taking for IVF and telling them I was trying for a baby made them understand I would be gaining weight from this point on, so I felt like I was off the hook for not being my usual weight: does that make sense?
Bizarrely, when I become pregnant I become ED free almost overnight from seeing the positive test and didn’t weigh myself at all during pregnancy and loved my bump and was so proud of my body.
Wishing you all the best with this.