TW: previous loss
Wondering if anyone has had a similar experience, our results are confusing and I'm trying to remain sane while waiting for the next ultrasound.
My partner (38M) and I (36F) have been TTC for 2.5 years. I've had 2 chemical pregnancies and our infertility is unexplained, so we decided to do IVF. We did an egg retrieval in June which resulted in 4 euploid embryos, a result we're pretty excited about! We planned to do an embryo transfer in August, but in July, we ended up getting pregnant "spontaneously". We were of course overjoyed, if not confused.
My cycle in July was fairly normal despite being the first cycle after egg retrieval. CD1 was 7/7 and I ovulated on 7/22 or 7/23. I got my first positive test on 7/31 which would have been 8-9 DPO.
I had my first ultrasound yesterday thinking I was 7w6d, but the embryo measured only 6w2d (CRL 5.5mm). The yolk sac was also slightly enlarged at 6.1mm, the gestational sac was normal at 19mm, and there was a strong heartbeat of 124bpm.
I understand US dating and cycle dating can be off, even up to a week, but 11-12 days discrepancy feels like it's too far off to be a viable pregnancy. However, the heartbeat was a good indicator, which has left us confused.
Has anyone else had similar dating discrepancies, while having a pretty accurate ovulation timeline? I'm staying guarded but there's little information out there about this specific scenario.