Congrats 25weeker!!!!!
Sam it depends on the circumstances. On the first app about 13 weeks we went through Alexs old birth files and couldn't figure out a reason for delivering. All we could do, was assume it was a type of infection the hospital didnt pick up. So, I had swabs every four weeks taken at each consultant appointment. Inbetween that landed my scans and FFN tests, and started the progesterone at 22 weeks