The Fertility Assessment Kit
Go beyond ovarian reserve for a more complete picture
of reproductive health.
More Markers. Greater Insight.
ZRT’s introduction of AMH testing opened a new window into ovarian reserve. The new Fertility Assessment Panels build on that foundation, bringing together key pituitary, ovarian, adrenal, and thyroid markers in one convenient dried blood spot collection. Follicular and luteal phase testing provide different insights into reproductive function, supporting a more complete fertility assessment.
Choose the Panel That Fits
B-244
Fertility Basic
Measures AMH, LH, FSH, TSH, prolactin, and cortisol.
B-245
Fertility Advanced
Includes everything in Fertility Basic, plus estradiol, progesterone, testosterone, and DHEAs measured by LC-MS.
Both panels use an at-home finger stick collection. Individual testing options are also available in this kit for AMH, prolactin, LH and FSH, and vitamin D.
Introducing Prolactin Testing
Prolactin is now available in ZRT’s dried blood spot testing menu, both as part of the Fertility Basic and Advanced Panels and as an individual test. This pituitary hormone plays a role in reproductive health, and elevated levels can interfere with ovulation and menstrual cycle regularity.
B-209
Prolactin
Available individually within the Fertility Assessment Kit.
Collection Timing Matters
Early follicular testing, often called day 3 testing, and luteal phase testing, often called day 21 testing, provide different information. The best time to collect depends on cycle length and the questions being explored. Day 21 is an approximate target for a 28-day cycle; shorter or longer cycles may require a different collection day.
Fertility Testing Resources
Explore the resources below to compare panels, understand collection timing, and prepare a sample:
- Overview of Kits View the Fertility Assessment Panels alongside ZRT’s broader testing menu.
- Fertility Testing Guide Learn about the available tests and what follicular and luteal phase testing can show.
- Luteal Phase Collection Reference Guide Find guidance for timing collection across different cycle lengths.
- Fertility Assessment Collection Instructions Review panel requirements, collection timing, and step-by-step kit instructions.
- Blood Spot Collection Reference Guide Find additional guidance for collecting a blood spot sample.
UPCOMING WEBINAR
Assessing Infertility in Women: Understanding the Labs
October 15, 2026 | 10 a.m. PT / 1 p.m. ET
Join ZRT Clinical Consultant Dr. Alison McAllister for a discussion of infertility cases, lab selection, and practical approaches to patient care, including ZRT’s new Basic and Advanced Fertility Assessment Panels. ZRT Clinical Consultant Dr. Beth Baldwin will moderate and share clinical insights.
Learn more about how to collect your sample, becoming a provider, or ordering kits.
Frequently Asked Questions
Fertility Basic measures AMH, LH, FSH, TSH, prolactin, and cortisol. Fertility Advanced includes those markers plus estradiol, progesterone, testosterone, and DHEAs measured by LC-MS.
Fertility Basic provides a foundational assessment of hormones involved in reproductive function. Fertility Advanced adds LC-MS-measured hormones that offer further insight into ovulation and the luteal phase. Panel selection depends on the clinical questions being explored.
Day 1 is the first day of full menstrual flow, not spotting. Cycle days are counted from that date, rather than from the first day of the calendar month.
Yes. An early follicular collection is typically completed on days 2–4 while menstrual flow is still occurring. Refer to the Fertility Assessment Collection Instructions for timing details.
No. Day 21 is an approximate target for a 28-day cycle. The recommended collection day shifts with cycle length. The Fertility Assessment Collection Instructions and Luteal Phase Collection Reference Guide provide guidance for planning collection.
For infrequent or unpredictable cycles, the collection instructions allow collection on a non-bleeding day. The most useful timing depends on the individual circumstances and testing goals.
Please consult your healthcare provider before testing while using hormonal contraception. Depending on the testing goals, your provider may recommend discontinuing contraception for a month or more before collection. ZRT can test samples collected during contraceptive use, but the clinical usefulness of the results may vary. All hormones used and when they were last used should be listed on the test requisition.
Hormone therapy can affect test results. Whether testing should be completed on or off hormones depends on the clinical questions being explored and should be confirmed with the prescribing provider before collection. For fertility assessment, testing off hormone therapy may be recommended to evaluate baseline hormone levels. Prescribed hormones should not be stopped without provider guidance. All hormones being used should be listed on the test requisition.
