Get your ticket to DUTCH Fest 2026! Join us March 12-14 in Dallas, TX for cutting-edge hormone education and hands-on learning. Learn more and register today.*
*DUTCH Fest is exclusive to registered DUTCH Providers. Only registered DUTCH Providers can attend.
Hormone Therapy Collection Instructions
Biest
Biest is a compounded bioidentical hormone replacement therapy containing a combination of estriol (E3) and estradiol (E2), typically in an 80:20 ratio.
Oral Route
Rectal Route
Subdermal Pellet
Sublingual Route
Transdermal Route
Vaginal Route
Other Hormone Therapies
DUTCH Test Cycle Calculator
Determine your optimal collection days based on cycle length
Cycle Types
Regular Cycle
34 days or shorter
Long Cycle
More than 34 days
Irregular Cycle
Varies widely
No Cycle
Functional ovaries, no menstrual flow, or Post-Menopausal
Note: If you are taking one of our Cycle Mapping tests, collection will begin on the seventh day of your cycle. Learn more here!