I've just had my EC and on my 3 scans prior my follicles grew at a good rate and and my lining thickened up really well to 13mm. However at my egg collection the doctor said my lining had reduced to 6.2mm. I've got oestrogen as well as progesterone to tak3 now and they told me not to worry but I can't help it. Naturally they've said if it doesn't increase we'll have to freeze any fertilised embryos and work on the lining for my next cycle. Has any one else had anything similar?