Hi there
Re pmt or pms - it depends when you get it.
Mine was just like yours everyone's mum - each month without fail for a few days.
What happens during the second half of their menstrual cycle, is that progesterone begins to increase after ovulation, rises to a peak and then falls as quickly as it increased and as it falls this signals for the bleed to start. In addition oestrogen also falls at this time and starts to rise again approx at menstruation when progesterone has declined.
Most women suffer the classic pmt symptoms of tension, irritability - including rage - and sometimes headaches too, for the few days just before the period - most likely largely due to the sudden drop in progesterone. Many women also suffer from pms symptoms for the whole of the two weeks and maybe progesterone intolerant to a certain extent. Progesterone causes physical symtpoms of fluid retention - which can lead to bloating and discomfort, fuzzy head, fatigue and sometimes depression. Declining oestrogen can also cause depression and low mood. Most women feel at their best once their bleed is over and when oestrogen is at very high levels, just before ovulation and progesterone is at its lowest.
During peri-menopause the levels of hormones fluctuate up and down more - sometimes causing more extreme symptoms ( anxiety, weepiness etc), or less so especially during cycles where ovulation does not occur as happens at this time.
The anovulatory cycles as they are known, allow the womb lining to build up for longer than one month, and because there is no progesterone (because no egg is released), there is no bleed that month, and then when ovulation does occur eg three months later - the bleed might be 3 x as heavy - as silverlady says - you need the right amount of progesterone on a regular basis to shed the lining built up by the oestrogen.
There are other causes of heavy periods and if they are troublesome it may be worth being checked for fibroids etc?
There is an interesting article on the peri-menopause as one of the back magazine articles here:
http://www.menopausematters.co.uk/article-perils-of-the-perimenopause.phpHurdity x