Hormone Health Hub: Expert Insights on Testing, Balance & Better Living — fertility and endocrine health

If you are experiencing infertility issues, understanding which hormones to test — and why — is the essential first step. Dr. Alison McAllister of ZRT Laboratory explains the full fertility hormone profile: from LH and FSH as indicators of ovarian reserve, to estradiol, progesterone and testosterone for ovulation health, adrenal hormones cortisol and DHEA-S, thyroid markers including TPO antibodies, and the often-overlooked role of vitamin D in fertility and PCOS.

Infertility affects 1 in 8 couples worldwide — yet many are rushing into expensive IVF without first addressing the hormonal imbalances that may be silently undermining their chances. In this wide-ranging clinical discussion, Dr. Alison McAllister of ZRT Laboratory shares her expertise on the hormonal causes of infertility in both men and women, the key tests that are too often missed, and the complementary strategies that can dramatically improve outcomes.

Vitamin D is not just a vitamin — it is a steroid hormone that plays a critical role in fertility, conception, placental development and fetal health. From improving ovulation in women with PCOS to supporting sperm motility in men, adequate vitamin D levels matter at every stage of the journey to parenthood. Discover why testing before and during pregnancy is increasingly recommended.