@RoseAddict I'm a bit confused over why you need a blood test.
At 44 going on 45, it's so close to the cut off point of Nice that many GPs wouldn't bother when you have recognsoed symtpoms of peri meno.
but it is checking amongst other things for FSH, oestrogen and progesterone.
FSH, estrogen and progesterone ARE the checks done for early menopause.
The reason for doing blood tests in women under 45 is
1 To check there are no other reasons for symptoms
2 To be able to offer HRT if they are having an early menopause, because it's medically advised until they reach at least age 50.
To check ovarian function, you need the test between days 2-5 of a cycle. To get an accurate reading it's usually done over 2 cycles.
It sounds as if your GP is actually screening you so they can prove you need HRT (or not?) rather than treat you according to your symptoms.
If your FSH etc comes back as normal, are they going to refuse you HRT?
Because it's quite likely in peri you will get an inaccurate reading, as hormones fluctuate by the day.