Hi all.
Looking for anyone whose clinic has them do day 4/7 (or any day) blood tests after embryo transfer to check progesterone and/or estrogen levels?
A number of Instagram IVF warriors I follow have these tests done in the US, and also the there seems to be a trend for estrogen supplementation on a stims cycle which isn't something I've ever encountered despite multiple rounds at different clinics, AND v v below AMH / undetectable estrogen levels. 
I know the USA has some different trends to here (their love of PIO) but would also like to hear from any others who have experience of these post ET blood tests?