This didn't really surprise me.
I went to the Drs. with stomach cramps and was told 100% positively that I wasn't pregnant and that they thought I had some sort of tumour....
At 20weeks, I was told I was PG (UNplanned, but very welcomed!)
I was told something quite similar - I'd missed the scans etc., so it was a case of going through with the birth or a termination....
I was pretty shocked... I remember driving home that day, tears rolling down my face (it was a pretty emotional day, when you think you are going to hospital to investigate a tumour and you come out PG!!!!!!!!!!!!!!!!! ) rubbing my tummy, telling my baby 'he wasn't going anywhere' (I knew immediately it was a boy)
I got some more specialist scans done privately and everything seems to be OK....
But, this sort of thing does happen (Still, pretty schocking, given she'd had IVF!)