Hi there kdee69
Reading about the stages of peri-menopause etc I gather there is still some ovarian activity for some years following the menopause so although they won't be proper big cycles like when you ovulate - I presume there must be some cyclicity ( is that a word even?). So - as the ovaries fail they don't respond properly to hormones from the brain (FSH) so this rises to try to get them to ovulate. Even after the last ovulation - it's not sudden an complete death (cessation of all activity)so the ovaries continue to be stimulated and I presume some earely follicles start to gorw but they never mature. As they start to grow they produce oestrogen but as they can't ripen ( due to menopause and ovarian failure) the follicles presumably just get reabsorbed and then it starts again. Not sure if this would still be actually regular if no ovulation but this is how I understand it. There's a technical paper called "Stages of Reproductive Ageing" where this is all explained. This one:
https://www.medscape.com/viewarticle/430187 . This might be a better link:
http://www.menopause.org/docs/default-document-library/straw10.pdf'sfvrsn=67b7c029_2The period of time following the initial fall in oestrogen following menopause (which lasts for two years) - apparently can last for 3-6 years and during this time FSH stabilises as does oestrogen.
I imagine it as a small saucepan of thick porridge! If you've ever cooked it - once it's cooked if it's very hot and you turn it to low you get these really thick bubbles and every now and again one of them pops. I think of the underlying bubbles as eggs starting to ripen and the ones that pop - ovulation (well only one should pop but I'm sure you get what I mean?). As the porridge cools down you still get the bubbling but not hot enough to pop and then gradually there are no bubbles when it's too cool. This is how I imagine the post-menopausal few years!!! Where there is still a bit of bubbling - oestrogen is produced, but in the absence of ovulation you do not get the progesterone so not sure it would be two weekly exactly but depends how long it takes to partly develop a follicle into an egg etc?
I'm probably taking absolute rubbish but some of it is based on what is known to occur!!!
Did you have 12 months without a natural period ( no mirena, no mini pill) before starting HRT?
SV66 - if you have a Mirena it is not possible to tell where you are in menopause really so if you feel like you are having a cycle then you probably are - although could be just post-menopausal slight fluctuations as I mentioned - the porridge effect?!
Hurdity x