Yes Dotty, I do and I am 10 years post menopause. That said, it's difficult to give you a precise number because I use Oestrogel but nonetheless, I need shed loads of oestrogen to feel completely normal and keep the migraines away. Anything under the 700s is useless for me. Unfortunately I am severely progesterone intolerant so it's a difficult balancing act but I think I have finally cracked it now.