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[dazned]

I'm confused ,nothing new there 

I was under the impression that progesterone is needed to maintain a pregnancy! So how does giving norethisterone ( strong progesterone ) induce a bleed ? 

I have tried to read so much I'm tying myself in knots with it all ! I know my own hormones now should be very depleted at 55 so why should they be more up and down then they were when I was 49 ? Surely they should just be lower but more stable ! I'm a bit embarrassed that I'm so ignorant. And the more I read all the web articles the more confused I am 

[dahliagirl]

Progesterone changes the lining from proliferation where the cells are just dividing and increasing and growing, to a 'secretory' phase, where the nature of the tissue changes to make it suitable for implantation.  This never seems to be explained properly in biology lessons, so I am not sure what exactly it means.

A period comes after the hormone levels drop rapidly, so it is the withdrawal of the progesterone that causes the bleed.

Hope this helps.

It is confusing

[honorsmum]

Can't help with the progesterone bit Dazned but can certainly empathise with the confusion!

S x

Me too! It hurts my brain!!

[dahliagirl]

Also, I have just read that as you get past day 21 (optimal day for implantation), then the continuing progesterone changes the lining in ways that prepare it for shedding.  (decidualisation??? )

[dazned]

Well at least it's not just me then that's a bit confused !  Feel a bit better now !

Ah that explains it DG thanks it's the sudden drop of progesterone that causes the bleed makes sense now SIMPLES 

I do like things to make sense in my head it's how I 've always been that way  I was that awful child that kept on " but why Mum " 

[dazned]

Decidulisation ! Isn't that what trees do ,drop their leaves!!!