Unexplained Infertility & Endometrial Insufficiency

“Unexplained Infertility”? It’s time to dig deeper.

Don’t accept a vague diagnosis — it’s often just a placeholder for “we didn’t look far enough.” At Rejuvenating Fertility Center (RFC), we do “DEEP FERTILITY CHECK” and believe in uncovering the real reasons behind fertility struggles.

Here’s what your doctor may have missed:

1️⃣ It might not be an egg or sperm issue at all — it could be IMPLANTATION. Meet “Endometrial Insufficiency”
Shockingly, nearly 40% of patients doing IVF don’t actually need IVF. Sometimes, the embryo just can’t implant — and if no one checks the uterine environment, it’s easy to miss.

  • Poor blood flow to the uterine lining.
  • Impaired receptivity, meaning the lining may not respond well to hormonal signals that support embryo implantation.
  • Thin endometrium: Often defined as <7 mm in thickness during the implantation window.
  • Hormonal imbalances (especially low estrogen)
  • Previous uterine surgeries or infections (e.g., D&C, Asherman’s syndrome)
  • Chronic inflammation (e.g., chronic endometritis)
  • Prolonged use of certain fertility drugs
  • Age-related decline in uterine function
  • Failed implantation
  • Recurrent pregnancy loss
  • Lower success rates with IVF and embryo transfer
  • Hysteroscopic evaluation and treatment of scarring or adhesions
  • Vaginal Viagra (sildenafil) to improve blood flow
  • Intrauterine PRP (platelet-rich plasma) infusions and/or PRP INJECTIONS BY HYSTEROSCOPY
  • G-CSF (granulocyte colony-stimulating factor) infusions
  • Lifestyle changes (nutrition, exercise, stress management)

2️⃣ We’re living in an increasingly INFLAMMATORY world. (see Reproductive Immunology section below)
Immune-related fertility issues are on the rise — and standard fertility clinics rarely test for them. That’s why we offer a comprehensive Reproductive Immunology Panel to identify immune imbalances that can block conception or cause miscarriage.

3️⃣ Sperm health goes far beyond a semen analysis.
Even when counts and motility look “normal,” Sperm DNA Fragmentation can cause infertility and miscarriage — and yes, it’s backed by the American Society for Reproductive Medicine (ASRM).

4️⃣ Hormonal Imbalances

  • Subtle imbalances (like high prolactin, low progesterone, or thyroid dysfunction) may not be flagged in routine tests.
  • Can affect ovulation, uterine lining, or early embryo support.

5️⃣ Lifestyle & Environmental Factors.
High stress, poor sleep, endocrine disruptors (plastics, pesticides), and toxins can impair fertility subtly but significantly.

What Is Reproductive Immunology?

It is a field of medicine that evaluates the interactions between the immune system and components related to the reproductive system such as maternal immune tolerance towards the embryo or fetus. We use reproductive immunology testing to try to find explanation for unexplained reasons of infertility, recurrent miscarriages, and pregnancy complications observed when this state of immunological tolerance is not successfully achieved.

The immunological system of the mother plays an important role in pregnancy because the mother’s body considers the embryo (which is half sperm and half egg) is “half foreign” and thus it needs to make sure that the embryo will not be rejected.

During pregnancy, immunological events that take place within the body of the mother are crucial in determining the healthiness of both the mother and the fetus. In order to provide protection and immunity for both the mother and her fetus without developing “rejection reactions,” the mother must develop “immune tolerance” to her embryo/fetus.

The placenta also plays an important part in protecting the embryo from the mother’s immune system attack. Secretory molecules produced by placenta and maternal uterine immune cells work together to develop a functioning placenta.

This field of Reproductive Immunology is known to help in the treatment of endometriosis, inflammation-related infertility, and previously failed in vitro fertilization
(IVF) treatments.

For example, Endometriosis could be associated with other immune and inflammatory disorders, such as:

WHAT IS REPRODUCTIVE IMMUNOLOGY WORK-UP?

  1. Parental Histocompatibility: High-resolution HLA typing of both partners to identify Classes I and IImismatches. 
  2. Maternal Immunogenetics: Maternal KIR genotyping and both partners’ HLA-C typing to evaluateinteractions between maternal uterine NK cell receptors and embryo-derived HLA-C ligands. 
  3. Maternal blood immune cells and cytokines. 
  4. Thrombophilia and Endocrine Function: including thyroid function, metabolism, and nutritional status.

POTENTIAL TREATMENTS INCLUDE:

  • Intra-lipids infusions to lower NK (Natural Killer) cells
  • NEUPOGEN (G-CSF)
  • Endometrial biopsy for lining inflammation and receptivity
  • Intravenous immunoglobulins (IVIG)
  • Omega 3 supplementation such as EPA and DHA
  • Steroid to lower inflammation such as Prednisone
  • Blood thinners such as Lovenox, Heparin, or baby aspirin
  • Other treatments based on each patient medical history

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