The blood tests are FBE - full blood examination which measures the haemoglobin among other things. LFT/E - liver function test / electrolytes. Se BHCG - is serum hormone levels of pregnancy. They are not inappropriate tests but check before the blood is taken that they are measuring for the levels for a NT. The ultrasound request should be fine top - just tell them when booking that it is for a NT. It is the only reason for a 12 week scan really. For the brown spotting now you would need a request for a scan now to check on the baby.

Sorry if this is patchy - it is difficult to respond on the iPhone!!