Description

Track your natural hormone rhythm for clearer answers.

The Rhythm™ test is a focused, 28-day salivary hormone panel that measures estradiol (E2), progesterone, and testosterone throughout an entire menstrual cycle. It is specifically designed for premenopausal and perimenopausal women who are not currently using hormone therapy.

This test captures daily hormonal fluctuations—offering more insight than a single blood draw can provide. It's ideal for women who want a deeper understanding of how hormone imbalances may be contributing to symptoms like PMS, irregular cycles, or fertility challenges.

Who Should Consider This Test?

You may benefit from the Rhythm™ test if you experience:

  • PMS or mood changes around your cycle
  • Irregular or unpredictable periods
  • Difficulty conceiving or maintaining pregnancy
  • Mid-cycle spotting or short luteal phase
  • Hormonal acne, breast tenderness, or bloating
  • Suspected estrogen dominance or progesterone deficiency
  • Perimenopausal symptoms despite still cycling

What This Test Measures

Collected through saliva samples across a full cycle, the Rhythm™ test evaluates three core sex hormones:

Estradiol (E2)

The primary form of estrogen. Levels are tracked throughout the month to detect irregular estrogen surges or deficiencies that can affect mood, ovulation, and menstrual regularity.

Progesterone

Measured during the second half of the cycle (luteal phase) to assess ovulation and overall balance with estrogen. Low levels may contribute to anxiety, PMS, and fertility challenges.

Testosterone

Essential for libido, motivation, energy, and muscle tone. This test identifies whether levels are too high (as seen in PCOS) or too low (common in hormonal burnout).

Why Saliva Testing?

Saliva collection allows for non-invasive, real-time tracking of active (free) hormone levels without the stress of blood draws. This method makes it easy to monitor your daily hormone rhythm, not just a single point in time.

Fasting: Not required

Test Duration: 28 days

Specimen Type: Saliva

Shipping: Nationwide kit delivery and prepaid return shipping included

The Rhythm™ test offers a clearer, more complete picture of your hormonal cycle—so you can make more informed decisions about your health, fertility, or treatment plan.