The Learn section brings together selected writing and conversations that reflect over a decade of clinical observation and pattern recognition. The focus is on understanding what shapes egg quality, sperm health, embryo development, and IVF outcomes, especially when effort and intervention haven’t delivered clarity.

This is not a resource library. It’s a curated body of work.

Featured writing

12 articles

These articles reflect our current areas of focus. They explore fertility through a biological and functional lens, with attention to egg and sperm quality, embryo development, inflammation, immune signaling, microbiome health, and why outcomes do not always match expectations.

Some pieces are written by Sarah Clark, others by medical and clinical contributors. All are selected for their ability to support clearer thinking around fertility decisions, including IVF.

The Egg & Reserve

The IVF Cycle & Outcomes

The Environment & Systems

Featured conversations

Podcast episodes

Selected from hundreds of podcast episodes. These discussions focus on egg and sperm biology, embryo arrest, IVF failure, and the functional patterns that influence outcomes.

Start with the conversation that best reflects your current situation.

If you are here right now

4 episodes −

Why IVF Failure Is Rarely Just "Bad Luck"

Why Rushing Into the Next IVF Cycle Often Backfires

Low AMH Is Not a Diagnosis: A Case That Changed the Outcome Without Chasing the Number

POI vs. Early Menopause: What's the Difference, and Why It Matters for Fertility

If something isn’t adding up

4 episodes +

Day 3 vs Day 5 Embryo Arrest: Why the Explanation Is Rarely Simple

Recurrent Implantation Failure: Why the Explanation Often Feels Incomplete

If you’re deciding what to do next

4 episodes +

Failed IVF Cycle: What Your Last Cycle May Reveal Before Trying Again

Why Your IVF Cycle Was Decided 90 Days Before It Started

The fertility vault

Full archive

Explore our complete archive of fertility podcasts and articles published over the last decade, including conversations on IVF, low AMH, recurrent miscarriage, implantation failure, egg quality, and functional fertility.

Why IVF Can Fail Even With "Good" or Euploid Embryos

Low AMH But Regular Periods: What This Actually Means for Fertility

Misled by Low AMH? How At-Home Ovarian Reserve Tests Are Fueling Fertility Panic in America

Browse the full vault

How to use this page

Full archive

You do not need to read or listen to everything. Many people arrive here after a failed cycle, while preparing for IVF, or when they feel pressure to move quickly without fully understanding what is influencing outcomes.

Learn exists to provide context and orientation, not direction or instruction. For individualized interpretation of your own history and data, that begins with a Second Opinion.

Book a Functional Fertility Second Opinion