My sister has currently had her second attempt at ivf. Both times she got a positive pregnancy test but started spotting 9 days after transfer then full period. What we are wanting to know is what is the normal amount of progesterone to be on as she was on pessaries once a day and a drug called Progynova 3 tablets a day(which after googleing found out it is oestrogen). The FS isn't exactly helpful in explaining anything and to me it seems like she should be on higher Progesterone to ensure she doesn't get her period as she has a short period from when she ovulates to the beginning of her period. There was no bloods taken to check any levels of progesterone or oestrogen so how to they know what someone should be on. She is going back for her last time so we want to go in with as much knowledge as possible so we know she is getting the best results because at this stage she can fall pregnant but just need to work out why it doesn't stay.

Any help would be greatly appreciated