This has been a terrible roller coaster ride the past week or so. At 6w, they saw 2 gest. sacs and one had 1 yolk sac, the other had 3 yolk sacs. At 6w3d, there was not much growth, still no fetal poles/heartbeats. Today at 6w6d, they confirmed the identical triplets stopped developing, but the fourth one developed a heartbeat. It is measuring exactly one week behind at 5w6d and has a heart rate of 102. They are not very optimistic. I have to go back next week for another u/s. I am so tired of this roller coaster.
TTC with unexplained IF since 8/2007
6 losses, one beautiful perfect boy in our arms

Re: Any IVFers measure one week behind on u/s?
I had my first u/s at 6w5d with a h/b of 115. My little guy was measuring at 6w0d though. My RE said it was fine and he was probably just a little bit late implanting.
Obviously, my guy has been fine since then and he actually measures one week ahead now.
I'm really sorry you're going through such a rollercoaster! I wouldn't give up hope yet though.......
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My DD consistently measured 3-5 days behind. She is still a little peanut! I think her first hr was 112. It ended up going into the 180s once she grew a little!
Good luck!
Yep- it happened to me. I'm now 21 weeks. My RE was more than a little pessimistic. She was downright mean! Here's what happened
5 weeks- only a sac sort of visible (told me it wasn't viable)
6 weeks- fetal pole and sac visible (told me still not looking good because measuring small
6 weeks, 5 days- no heartbeat. RE told me to get viability test (basically an u/s with a stronger piece of equipment) and then get ready for the d & c. I measured 5 days behind at that point.
7 weeks, 4 days- heartbeat at 152 and measured 5 days behind. U/S Tech said not to worry about size. She said a week +/- was ok. RE said probably still not viable.
I left the RE at that point and went to the OB. I never looked back. My baby is now exactly where she should be in size and is totally healthy (20 week anatomy scan and amnio done).
I know the rollercoaster you feel you're on. I felt exactly the same way. I just wanted to know the answer one way or another. Someone had a great line- I'm pregnant today and I love my baby. I don't know what will happen tomorrow but for now I'm pregnant. I told myself that 1000 times a day after each RE appointment when my RE made me cry and told me it wasn't viable. I can't wait to send her a baby announcement in August. I hope you can do the same to your RE too!!
Good luck! I'm crossing my fingers for your little one and I'm sorry about the loss of the triplets.
IUI- BFN IVF #1 -BFP! Allie is our 2nd IVF baby. Born at 36 1/2 weeks after pre-e again
I'm so sorry you're going through this. I know the wait is just excruciating. I had a similar experience with my pregnancy.
At 5w4d I had an ultrasound and there was just a tiny black dot, which my RE said may be a gest sac, but it didn't look good. I went back at 7w and had two heartbeats: one at 107 and measuring 6w3d and one at 103 measuring 6w. We went back at 8w and one was measuring a few days behind with a hb of 114 and the other had grown only slightly and had a hb of 93. At the next appointment, we only had one baby and her hb was in the normal range. She's been fine since!
I REALLY hope everything works out for you!!! My fingers are crossed! Please keep us updated.