There are few situations in which FSH levels have any clinical utility, and many commercial companies seeking to part women from their hard-earned, at what can be a vulnerable time of life.
I would think about what question you are hoping this test will answer, and then figure out the best way to address that, ideally without purchasing anything from an unregulated source for a huge mark up.
Also there is no evidence that I am aware of correlating urinary FSH with plasma levels, so if the test is indicated it is better to do a blood test.
