Told Donor Eggs After Failed IVF? The Gut Pattern Your Clinic Did Not Test

Sarah Clark recording Get Pregnant Naturally podcast on gut testing before donor egg decision

The IVF cycle did not work.

Maybe it was a poor response. Maybe it was canceled before retrieval. Maybe you got embryos, and they arrested. Maybe the transfer failed.

Your clinic looked at your numbers and recommended donor eggs.

There is a category of testing your fertility clinic did not run. We rarely run a stool test and find nothing.

This post is about the gut findings we see in women who come to us after failed IVF with a donor egg recommendation, and why these findings change the picture before the next decision.

Listen to the Episode


Quick Scan: 3 Things You Should Know

  1. Most fertility clinics do not run a stool test before recommending donor eggs. The standard workup measures AMH, FSH, and antral follicle count, and stops there. The gut, the inflammation, and the nutrient absorption are not part of the workup.
  2. H. pylori, parasites, bacterial overgrowth, fungal overgrowth, elevated calprotectin, and elevated zonulin are findings the Fab Fertile team sees across our caseload. They affect iron, B12, and zinc absorption, the three nutrients underneath egg quality, thyroid function, and hormone production.
  3. A donor egg recommendation responds to the outcome of your cycle. It does not investigate what was driving the outcome.

3 Patterns We See

Pattern 1: She has digestive symptoms she stopped connecting to fertility

Bloating after meals, sometimes for years. Gas. Belching. Burning in the upper abdomen, especially when her stomach is empty. Nausea that comes and goes. Feeling full quickly. A history of IBS, IBD, or "gastritis" that someone put her on a PPI for, without testing for an underlying cause. Reflux managed with antacids for years, with no one asking why it was happening.

These are common. They are not normal.

Her clinic asked about her cycle, her partner's semen analysis, and her uterus. Nobody asked about her gut. The bloating and the burning sat in a different folder from her fertility.

H. pylori can also be completely silent. Many women with the infection have no GI symptoms at all. Symptom presence does not confirm infection and symptom absence does not rule it out. That is why we test.

Pattern 2: Her GI Map comes back with H. pylori, often with virulence factors elevated

The GI Map does not just say yes or no on H. pylori.

It also tells us how active the strain is.

H. pylori carries different markers, and some have more effect on the body than others. When those markers show up, the infection is doing more downstream. More inflammation in the gut lining. More effect on the cells that absorb your nutrients. More impact on iron, B12, and zinc absorption.

This is what we see again and again in the women who come to us after a failed IVF. Not just H. pylori. H. pylori with the markers that explain why nutrient absorption is off.

Pattern 3: Her partner has it too

H. pylori has been documented in saliva at high rates in infected patients, and within-family transmission is well-described in the gastroenterology literature. The strength of spousal transmission specifically is still debated, with some studies showing low strain concordance between spouses and others showing within-household transmission.

In our clinical experience, when one partner tests positive on the GI Map, we test the other. We see infections in both partners often enough that partner co-testing is part of how the team works. Working with one partner without the other can leave the gut picture partially addressed.

What We Look At That Your Clinic Did Not

When a woman comes to us after a failed IVF with a donor egg recommendation, we recommend a GI Map stool test on both partners. We also suggest an HTMA, which reads your mineral status over the last three to four months rather than just what is in your blood today. We ask for a full thyroid panel, the iron panel against the fertility target, food sensitivity testing, the vaginal microbiome, semen analysis with DNA fragmentation on him, and bloodwork on both of you.

This is not extra testing. This is what a complete workup looks like before a donor egg decision.

Functional Fertility Approach vs Standard REI Workup

Standard REI Workup Functional Fertility Approach
AMH, FSH, antral follicle count AMH, FSH, antral follicle count plus the upstream drivers
TSH alone for thyroid Full panel: TSH, Free T3, Free T4, Reverse T3, TPO, TGAb
Ferritin flagged at deficiency cutoff (~15) Ferritin against fertility target (50+) with full iron panel
Gut not investigated GI Map stool test on both partners, including H. pylori with virulence factors, parasites, bacterial and fungal overgrowth, calprotectin, zonulin, pancreatic enzymes
Mineral status from blood snapshot HTMA for tissue mineral status over 3-4 months
Inflammation not measured hsCRP, calprotectin, immune markers
Male partner: semen analysis Semen analysis with DNA fragmentation, full bloodwork, GI Map
Vaginal microbiome not tested Vaginal microbiome panel
Nervous system not connected to fertility DUTCH with four-point cortisol curve, nervous system work for both partners

 

We work alongside your medical team, not instead of them. The REI workup is built to measure your numbers. Functional fertility testing investigates what is driving them.

What the Research Says

Six studies worth knowing about before the next decision.

Zonulin and diminished ovarian reserve. A 2023 prospective study in the Turkish Journal of Obstetrics and Gynecology (Çelik et al., 224 patients) found zonulin levels were significantly higher in women with diminished ovarian reserve than in women without DOR. Zonulin is the protein that regulates the tight junctions in the intestinal lining. Elevated zonulin is associated with increased intestinal permeability. The authors proposed zonulin as a biomarker in the diagnosis of DOR and discussed autoimmunity and inflammation as the mechanisms connecting gut barrier function to ovarian outcomes.

Crohn's disease and lower AMH. A 2023 case-control study in the Journal of Ovarian Research (Xiang et al.) compared 135 women with Crohn's disease to 878 healthy controls. AMH was significantly lower in the Crohn's group (2.17 vs 3.95 μg/L). Disease activity was an independent risk factor for decreased ovarian reserve. The mechanism the authors discuss is chronic inflammation affecting the ovarian environment.  I interviewed Angie Alt about her study with the Autoimmune Protocol (AIP diet) and reversal of IBD symptoms here.

H. pylori and adverse pregnancy outcomes. A 2019 systematic review and meta-analysis of 31 studies (Tang et al., 22,845 participants) found H. pylori infection associated with spontaneous abortion (OR 1.50), preeclampsia (OR 2.51), fetal growth restriction (OR 2.28), gestational diabetes (OR 2.03), and birth defects (OR 1.63).

H. pylori virulence factors and early pregnancy loss in ICSI. A 2011 prospective study in the International Journal of Women's Health (Hajishafiha et al., 187 infertile couples undergoing ICSI) found women infected with CagA-positive H. pylori strains were more likely to experience early pregnancy loss. The sample subset was small, and the confidence interval was wide, so the finding is suggestive rather than definitive, but it is part of why we report virulence factors as part of the gut picture, not just H. pylori status alone.

Genetic causal evidence linking H. pylori to pregnancy outcomes. A 2024 two-sample Mendelian randomization study in Frontiers in Cellular and Infection Microbiology (Huang et al.) used anti-H. pylori IgG levels from the Avon Longitudinal Study and outcome data from the FinnGen consortium. Genetically predicted H. pylori exposure was causally associated with increased risk of preeclampsia (OR 1.12) and premature rupture of membranes (OR 1.17). Mendelian randomization reduces confounding because genetic variants are assigned at birth and unrelated to lifestyle factors. The same study did not find a causal effect on miscarriage specifically, which is worth knowing. The observational data on miscarriage is real. The causal evidence is partial.

Genetic causal evidence linking gut microbiota composition to female infertility. A 2023 two-sample Mendelian randomization study in Microorganisms (Zhang et al.) used MiBioGen consortium data on 18,340 individuals. Specific gut microbiota taxa showed causal protective effects on female fertility (Family XIII AD3011 group OR 0.87, Ruminococcaceae NK4A214 group OR 0.85), and others showed causal adverse effects (Betaproteobacteria OR 1.18, Burkholderiales OR 1.18, Candidatus Soleaferrea OR 1.12, Lentisphaerae OR 1.11). This is some of the strongest evidence we have that gut microbiota composition is not just associated with fertility outcomes, but causally connected to them.

The research is not telling you donor eggs are wrong. It is telling you that the gut is part of the fertility picture, that gut barrier function and inflammation are part of the picture, and that none of this is part of a standard REI workup.

Why This Matters Before a Donor Egg Decision

The gut findings above matter because of what they do downstream to the markers your clinic measures.

H. pylori impairs absorption of iron, vitamin B12, and zinc. The mechanism is mucosal damage and altered acid production in the stomach. The result is ferritin reading at 20 ng/mL, with the clinic saying iron is fine, because the lab cutoff begins around 15. Functionally, 20 is low. Iron supports oxygen delivery to your follicles.

B12 supports methylation, the process your body uses to produce the co-factors involved in egg maturation. When H. pylori is present, serum B12 can read in range while functional B12 deficiency is developing. This is why we look at B12 alongside homocysteine, and why we look at the mineral picture through HTMA rather than relying on a one-time serum snapshot.

Zinc supports ovulation and progesterone production. Zinc deficiency is one of the patterns we see most often on HTMA in the women who come to us with low AMH and failed IVF.

When the gut is inflamed, calprotectin and zonulin are elevated, hsCRP often sits above 1, and the systemic inflammatory environment affects ovarian response to stimulation, implantation, and miscarriage risk.

When your clinic looks at a canceled cycle, arrested embryos, or a failed transfer and recommends donor eggs, they are responding to the outcome of your cycle. They are not asking what is driving the outcome.

FAQs

My fertility clinic said my iron is fine. Why are you saying it might not be?

The standard lab range for ferritin begins around 15 ng/mL. That range is built to flag overt iron deficiency anemia. The fertility-relevant target we use is 50 ng/mL or higher. A ferritin of 20 reads normal on the standard range and reads low against the fertility target. Iron supports oxygen delivery to your follicles. If H. pylori is impairing absorption, iron supplementation by itself rarely moves the picture and is part of the conversation to have with your medical team

I do not have any gut symptoms. Why would I have H. pylori?

H. pylori is often silent. Many infected people have no GI symptoms at all. The infection can still affect nutrient absorption and systemic inflammation in the absence of bloating, nausea, or reflux. Testing is what tells us, not symptoms.

Why test my partner if my AMH is the issue?

H. pylori has been documented in saliva at high rates in infected patients. Within-family transmission is described in the gastroenterology literature. In our experience, when one partner tests positive on the GI Map, the other often does too. Addressing one without the other can leave the gut picture partially addressed. We also review his bloodwork, semen analysis with DNA fragmentation, and seminal microbiome as part of the functional fertility second opinion.

I have already done one stool test and nothing came up. Why test again?

We do not run a single stool test in isolation. We run a GI Map alongside food sensitivity testing, the full thyroid panel, the iron panel, HTMA, the vaginal microbiome, and bloodwork on both partners. A stool test interpreted without a fertility context, or without the rest of the picture, often misses what is relevant. The pattern only reads when all of the data is in front of the same set of eyes.

Does this mean donor eggs are off the table?

No. Some women go through a full functional fertility workup and still move to donor eggs. That is a valid path. The point is that the decision gets made after the full picture has been evaluated, not before it. Working on your gut and your inflammation also improves the environment for a donor egg cycle to implant and a pregnancy to be carried.

Stories From Fab Fertile Community

Working with couples for over a decade, the women who come to us after a failed IVF with a donor egg recommendation often share variations of the same gut story. Bloating after meals for years. A diagnosis of IBS in her twenties. Months of antibiotics for sinus infections or UTIs. Hormonal birth control from her late teens to her late twenties.

When the GI Map comes back, the pattern is usually visible. H. pylori with one or more virulence factors is elevated. A parasite. Dysbiosis. Elevated calprotectin. Sometimes one of these. Sometimes all of them.

She tells us her REI never asked. Her OB/GYN never asked. The clinic looked at her cycle, her uterus and her partner's semen analysis, and built a donor egg recommendation on that picture.

The work is not about overturning the diagnosis. It is about completing the picture. Some women conceive with their own eggs after the gut work is done. Some still move to donor eggs and have healthier pregnancies because the underlying inflammation is no longer working against them. The outcome depends on the woman, the timeline, and the specifics of her case. The point is that the decision gets made on the full picture.

Episode Timestamps

[00:00] The Donor Egg Recommendation After a Failed IVF Cycle

[01:00] Why the Fab Fertile Team Reviews Your Picture

[02:00] H. pylori: The Most Common Gut Finding We See

[03:00] Parasites, Streptococcus, and the Bacteria Most REIs Do Not Test

[04:00] Why a Single Gut Test Without Fertility Context Misses the Picture

[05:00] Iron, Ferritin, and the Fertility Range vs the Lab Range 

[06:00] B12, Methylation, and Egg Maturation

[07:00] Zinc, Ovulation, and Progesterone

[08:00] What Your Clinic Missed: The Markers Before a Donor Egg Recommendation

[09:00] Why a Donor Egg Recommendation Responds to the Outcome, Not the Cause

[10:00] The Functional Fertility Second Opinion: What the Call Covers

The Case for a Second Opinion

If you have been told donor eggs are your next step and your workup did not include a stool test with virulence factors, an HTMA mineral panel, the iron panel against the fertility target, or a comprehensive look at your partner, the recommendation was made on a partial picture.

This is not a reason to ignore your clinic. We work alongside your medical team, not instead of them. None of this is a promise of any outcome. Some women go through a full functional fertility assessment and still move to donor eggs. That is a valid path, and for some women it is the right one. The point is that the decision gets made after the full picture has been evaluated.

👉 Book a Functional Fertility Second Opinion here.

We review your timeline, your existing labs, and your IVF history together with your partner's picture, and identify what may have been missed before the next decision gets made.

👉 Download What Your Clinic Missed:  Email hello@fabfertile.ca, subject line MISSED

The guide walks through the markers we look at before a donor egg recommendation, including the thyroid panel, the iron panel with the fertility target, the gut testing your REI does not order, the inflammatory markers, and the male side.

Related Reading

Told I Need Donor Eggs? Ask This Before You Decide

Why Iron Could Be Behind Your Low AMH, Failed IVF, and Miscarriage

Why "Normal" Labs Aren't Optimized for Fertility

Sarah's POI Story: Before Donor Eggs, What Was Never Evaluated

Why Your Gut Microbiome Matters for Low AMH and High FSH

Pregnant Naturally at 43 With Low AMH, High FSH, and Recurrent Miscarriage

Before Donor Eggs: 11 Things Most Clinics Miss in the Workup

Featured articles:

Low AMH: What the Number Signals and What It Does Not

High FSH and Fertility Decisions: When the Signal Is Misread

Diminished Ovarian Reserve: Interpreting Capacity Versus Potential

When Repeating IVF or Moving to Donor Eggs Without New Insight Leads to the Same Outcome

About the Host

I'm Sarah Clark, founder of Fab Fertile and host of Get Pregnant Naturally, a podcast with over one million downloads. My functional fertility team works with couples navigating low AMH and failed IVF, reviewing functional lab results, gut microbiome, food sensitivity, vaginal microbiome, nutrigenomics, HTMA, DUTCH, toxin testing, and bloodwork alongside nervous system work, to help identify patterns that may not have been considered. We work alongside your medical team, not instead of them.

Subscribe to Get Pregnant Naturally for weekly episodes on fertility optimization, IVF preparation, and the lab work your doctor probably isn't running.

By Sarah Clark, Founder, Fab Fertile | Host of Get Pregnant Naturally Podcast | Author of Fabulously Fertile

Last Reviewed May 2026