My eldest DC is 16. Whilst pregnant I drank 6-7 units a week every week. At that time 7 units was the recommended max. Before I was pregnant (and indeed before I knew I was pregnant) I was drinking 10-14 units a night, at least 4 times a week.
I'm an intelligent woman with a degree and professional qualifications. I also at that time lived a fairly hard drinking partying lifestyle, which in the absence of a partner or family, I wasn't able to give up. Although I was able to reduce my drinking, and did.
My pregnancy wasn't planned. I didn't know I was pregnant til several months in, went to few ante natal appts as I couldn't take time off work BUT at none of the ones I did attend was I ever asked about what I drank, nor told not to drink.
I'm not saying what I did was right, but it was in line with advice at the time. I didn't have time to read 100s of baby books, spend hours on research. I followed what the health professionals treating me said.
I appreciate times have changed. If I was pregnant now would I drink? Probably. My lifestyle now is very different to how it was then, I drink 1-2 units in a week, often less, and I'm sure after the first stage of pregnancy I'd continue to do so.