That won't apply though CLKD to someone with no ovaries, will it? If someone has no ovaries their hormone levels won't change randomly because they are not producing much of their own oestrogen, though I think ( correct me if not) that post-meno we continue to produce some oestrogen through our fat cells- which is why women who are overweight often have fewer menopausal symptoms, but conversely are at a higher risk of breast cancer due to higher levels of oestrogen.
Perhaps Itwill, you might experiment with where you apply the Oestrogel? I have heard that some women are 'poor absorbers' of topical products. I wonder if you changed where you apply it, you might get a more constant level? eg if you apply currently to your upper arms ( as I do) could you try your thighs instead?
The other issue perhaps is if it's being absorbed okay, is something else going on which is preventing it being metabolised and getting into your blood stream?
Be interesting to see what you find out next week!