Hi Scenic as Beetle said I think we all have that fear when our drug safety blanket is taken from us.
The placenta starts to take over at 9 weeks. If you think that Nuchal scans can be had from 11+3 and they check the placental blood flow then it is up and running for you now.
I wasn't on Pred but I was on Gestone, Cyclogest, Progynova, Estraderm, Clexane, Aspirin and 5mg Folic Acid. Gestone stopped at 9 weeks the rest tapered from 11-13 weeks. I was told to continue with the high dose Folic Acid until 16 weeks.
I do understand your fear. I had a MMC at 8+4 (discovered at 9 weeks). One of the (many) things it could have been down to was blood clots forming in the placenta so I was very paranoid stopping aspirin and clexane. Now 19+3 and touching all wood things are OK.
Yes Beetle, anomaly scan on Weds. Thankfully at 8:30am so no hanging around getting worked up...I hope.
Bugs I am going on mat leave early too. I am taking the full year and can't carry over holiday so in order not to lose my 2015 holiday entitlement I need to go mid-November. That means I 'finish' mat leave mid-November 2015 but then take my full years holiday so go back Jan 2016. I very much like saying I am going in 2014 and back in 2016! With mat leave/hols I had the same amount of time (14 months) with DS but I could work it so I had all the time after he was born. Still, can savour some quite time!