H, I found this on a menopause leaflet and copied and pasted it or I think it answers your question? Pminty xx
Why do I not have regular bleeds
with cyclical HRT?
The bleeds induced by cyclical HRT usually
occur towards the end of the oestrogen/
progestogen combined phase of the packet or
during the oestrogen alone phase. The tablets
containing the oestrogen plus the progestogen
are usually a different colour from those
containing oestrogen alone, and this is
specified in the instruction leaflet accompanying
the HRT you are taking.
The bleeds may not be as regular as you
experienced before the menopause or if you
have been taking the combined oral
contraceptive pill. Also 5% of women will not
have a bleed at all. You need not worry since
this shows that the lining of the womb
(endometrium) is very thin. However, consider
if you could be pregnant.
