Here is an alternate link for Smoky Mountian Estro Life
Continued use is needed to maintain results.
www.ebay.com
The above product contains one type of estrogen only, Estriol.
This OTC is a low dose Estriol, meaning that it unlikely to raise your systemic Estriol notably, if used at a dose of 1 pump per day applied to scalp.
You must do your own research to decide if it is a treatment that is right for your type of hair loss.
I'm a "layperson" also. I am not a medical professional. I would imagine most everyone in this forum is a layperson.
If you search through this site using "Estriol" you can read about other's experiences using Estriol on their scalp.
Keep in mind Topical Estriol has worked for some here and not for others. If low estrogen is the root cause of your hair thinning it may help.
In addition to Prolactin and Cortisol (as DarkHairHair suggested) I'd also encourage you to have all your Adrenal Androgens tested (DHEA-S, Aldosterone, Androstenedione, Pregnenolone).