Is late implantation possible with IVF?

It’s my first time doing IVF so a little clueless. I had a fresh transfer on 3 July of a 5 day embryo, then had bloods taken on 9, 10 and 11 July (so 6dp5dt, 7dp5dt and 8dp5dt) which I know is early but it was because I was going away on a trip and wouldn’t be able to do bloods later. They came back as hcg= 4, then 10 the next day and 15 the following day (so 24hrs difference with each test, doubling between the first two and then only 50% increase in 24hrs the second time, which I think is still good?) Question is - what can be the cause of such low hcg, could it be late implantation? Or is that not possible with IVF? Could I go on to have a healthy pregnancy or is that highly unlikely? I can’t go for scan until 8-9 weeks because I’m away and it’s difficult to do it here (scan or bloods) for various reasons. Should be 5w 4days today. Clearblue stuck on 2-3 weeks but FRERs and easy at home pretty dark (pics from this morning below and in comments)

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Dye stealer on your tests. Looks good, just have to wait and see til your scan now. Day 6 beta hcg is good at 4 and doubling in 48 hours also good. Now it’s the waiting game. And I can tell you from personal experience even the next scan and the next blood test still doesn’t ease the worry. It’s there all the time for me. But try relax and enjoy this time as much as you can!!! Try and keep positive and look after yourself!! Wouldn’t do any more tests either now: once you have a dye stealer they can’t tell you any more information for level of Beta-hcg. And in fact as they get higher and higher your test may get lighter due to the hook effect. Congrats and good luck!

It sounds like your HCG is still pretty much doubling every two days and the tests are very dark. I think you’re pretty damn pregnant.

@MJ thank you for the reassurance! So is late implantation possible in ivf or very uncommon?

Late implantation I think is relatively uncommon but is still possible in ivf. But I don’t think that is the case with you. It takes 3-4 days for implantation post transfer then a couple of days thereafter to get measured in blood. So I don’t think that is the case with you. I think frozen transfers are slightly more prone. But that wasn’t the case with you. I think you just had your bloods super early. I’ve read studies that say a beta-hcg of 5-10 5 days post transfer is a good sign of successful outcomes. I think 4 is also fine. Just remember it’s a tiny cluster of cells at that stage secreting a hormone; they need to grow and replicate: Either way it’s looking good for you! Hoping it all works out for the best!!!

@MJ thank you so much for the detailed responses 🙏🏼!! I hope your fertility journey is successful too ❤️❤️❤️

It looks very promising to me. Numbers are perfect and tests look amazing too.

Everyone’s ‘base’ hcg is different. What this means is we know non pregnant women have a level below 5, but once pregnant it’s the doubling that matters, i.e. If you start from 1 versus someone from 2 that’s already 2-3 days difference, not necessarily due to ‘late implantation’! So rest assured you are definitely pregnant and only scans can tell you more info now. All the best!!

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