Dee started spotting on the 12th day after her (1st) transfer. The bleeding got worse and it became evident that the first IVF was unsuccessful. They did, however, get 6 embryos that were good enough to freeze. Sometimes, even when everything's perfect, it just. doesn't. work. She's taking it in stride and will try again as soon as they'll let her (not sure if a fresh or frozen cycle, although if I were the one making the decision - and turning 40 next month - I'd opt for another fresh cycle & save the frozen ones for later).
On another topic, I've met a few people who are surprised that IVF dates as far back as it does. When I say my daughter (who'll be 17 in October) is an IVF baby, I sometimes get surprised responses... Having gone through it then and having recently followed the process - it has barely changed. The process itself, the day of transfer, the post-transfer treatment and even the success rates (I'm sure they must be somewhat higher, but even then they were in the 20-25% range). The biggest change is probably how often ICSI is used and the fact that clinics are transferring fewer embryos. 4 embryos was the standard in Israel then. Now, I think it's 2.