Hi Op!
I am the mother of a little girl who is now 10 months, who was diagnosed with Hip Dysplasia at 2 months and started wearing a pavlik harness.
I was really distraught at first because Hip Dysplasia has been a huge negative thing in my life (it was caught late and I've had to have hip replacements/ still get a lot of aches and pains). So at the time it felt like this huge looming BAD thing.
Now I forget she ever had it! The treatment when it's caught under a year is the most nothing, simplest thing. We had seven weeks total in the harness, and the scans show her as cured. We have one last scan to make sure at a year and a half old and then we are discharged.
Practicalities- like others have said it's well worth investing in the specialist clothes from M&S than trying to fit normal clothes around the harness. Car seat wise you can hire a car seat specially made to use with the harness from maxi-cosi www.maxi-cosi.co.uk/c/happy-hips-service and this was well worth it.
She was a little grumpy for a day or two after the harness went on. I was sad because she didn't feel as easy to snuggle and it made her body feel hard. I also took a while to re-work out the best ways to feed her.
It's well worth having someone else/ partner in the appointments with you as I was more nervous than my partner about handling her and not making things worse. Although they kept reassuring me I wasn't going to do any harm if I lifted her legs up etc I kept thinking I was going to break her somehow. He was confident so I let him do them first and build up my confidence with her.
We had a slight problem with her skin rubbing under one of the shoulder straps so keep an eye out for that - we used some medical dressing padding to stop it hurting her.
After four weeks we could take the harness off for some bath times and playtime. The time just went really fast. And then at the seven week appointment it was- yep all good, she doesn't need to wear this anymore. Goodbye and we'll see you in three months for a check up x-ray. The xray appointment the man scanning said everything looked totally normal and as it should be and if it wasn't written on her notes she'd had hip dysplasia he'd never have known!
If you have any questions please do let me know as I have gone through it all very recently. In hindsight I actually think it was one of the most minor things they could have told me my baby had, I mean how many things could your baby be diagnosed with that could be treated in a non-invasive, painless, and completely cured way in just seven weeks? :)