Good morning
@jasminesmom 
My kids are now 10, 8 and 6 years old - I deliberately chose to have kids in my 20s as wanted to have them while my hip felt good, and has been told to expect initially only 10-15 years out of my first replacement as I was young when having it so likely to put it through its paces! However it looks like it could last a good bit longer - in part because it's a great joint design I think (custom-made and at its time very cutting edge) and in part because I know I "protect" it.
I had hip problems from age 8 years old so for better or worse I tend to stand putting more weight through my good leg and my ligaments etc. are not great from growing "wonky", so range of movement a bit restricted- all of which has meant that I possibly put less wear on a joint than they had initially expected. I also have obeyed the no high-impact sports rule (in spite of being seriously tempted otherwise in my 20s when my hip felt great!) especially no running (which is a shame as running was one of my fave things aged 8!).
Instead I focused on cycling and swimming - but also did a lot of scuba diving in my 20s, and have tried a few watersports (wind-surfing, surfing- though due to bad balance from uneven weight-bearing found the latter very hard, so bodyboard instead (still to this day, though not amazingly well!!)) & used to do quite a bit of hiking and the odd bit of climbing. & of course danced about when I felt like it at gigs and the like! In other words, the THR gave me a pretty good quality of life & allowed me to do pretty much "normal" stuff, managed to go to uni, travel, work in various jobs, move a long way from home, start a family etc. etc. I am a marine biologist and still work on ships/boats quite often, and the hip has allowed me to do all that. (most of my work nowadays though is desk based).
So I have certainly made good use of the hip, and of course three pregnancies probably put a bit of strain on it, though I didn't seem to feel that in my hip, just my lower back & sacroiliac joints- like so many "normal" pregnant ladies! My babies were all born by c-section but not due to the hip. I had severe pre-eclampsia with each so all were preterm (thankfully the younger two only just by a couple of weeks) - in a way the c-sections probably saved some extra issues for the hip! Afterwards the hip felt fine and it really has only been in the past three years (when the hip would have been around 15 yrs old) that it has started to play up a bit especially in terms of stiffness. This does coincide with when I went back to work full-time so I do wonder if all the sitting at desks etc. hasn't helped - which is why I try to build in a bit of walking at lunchtimes etc. Friends now comment on my limp (as do others who have only just met me) - whereas before I barely limped so few would have noticed.
I am keen to delay a revision for as long as possible, in part due to not wanting to burden everyone else during my recovery etc., but also because I realise every op has risks and I worry I will be disappointed if it doesn't return to being as great as the first decade on my first hip. My ortho team seem to think although there is a little wear I really should get a good few more years out of it, so it's possible that the pain I have is all soft tissue and/or stemming from my lower back.
To be honest having walked a bit wonky for so long in my life it's almost inevitable something will complain eventually! My range of movement isn't great so things like doing up shoelaces have always been a challenge and consequently lifting toddlers etc. would have put a twist on my back and I have probably just done that too often over the years! However I am not yet dependent on painkillers to get through the days/nights (which I was before the THR) and find gentle stretches/walking/movement generally helps with the stiffness, or warm baths etc. I do feel old before my time right now (& have just moved all heavy pans/plates etc. up to higher cupboards as really struggle to lift them out of low ones!) but hope this will improve once the docs figure out the main issues and we get some sort of plan to get me moving better again.
My best advice would be to keep fit and active - hips definitely like a bit of movement not prolonged sitting, although nothing high impact! Core muscles & good posture is vital especially for all the rest of you which sometimes suffers from hip-induced limps etc. such as your back (I used to do yoga and pilates - sometimes had to have different versions of postures due to my hip movement limitations but could do a good bit), and keeping your weight to a healthy level puts less pressure on all the joints. (mine has crept up a bit after having the kids but just on the high end of "normal" apparently!- could do with losing a bit though!). I had "good leg" knee problems a couple of years after the THR which were apparently due to the wear on that leg while my hip was bad, so needed some cartilage trimmed/tidied but it was simple day surgery and has been great since. I was always warned that back and knees can suffer over the years if had long periods of hip issues.
I am forever glad to have had the hip done at age of 19, it certainly gave me my life back and let me dictate my future (mostly!). I have never been able to wear high heels (live in trainers, or used to live in DMs) - partly due to a leg length discrepancy - & I also had an awareness of wanting to pack a lot into my 20s while the hip was good, which most 20 somethings don't feel as strongly. But I realise that could also be just the way I am regardless of the hip!
I still dream occasionally of what it would be like to run pain-free, but that is a small thing to forego when there is so much else out there. As frustrated as I am currently by the increased stiffness and aches, and feeling less mobile, I know I have had a very good run of it so far and hopeful that I will get back to feeling like I did a few years ago whether through physio/regular cortisone injections or eventually surgery. I also realise I may have to make changes to how I work- less sitting/driving etc.
OK, that was an epic essay, sorry!! I sincerely hope Jaz gets the full benefit of her shiny new hip in the way I have, and that it lasts for a good long time to give her the similar freedom I have felt.
Hope the party goes really well tonight! xx