The Rhythm Plus™ + CAR test provides a comprehensive salivary assessment of estradiol, progesterone, and testosterone that spans a full 28 days. It is designed for premenopausal and perimenopausal women not currently supplementing with hormones. This test includes the Adrenocortex Stress Profile, the Cortisol Awakening Response, and the Comprehensive Melatonin Profile for a more complete hormone analysis.