Conventionally, pregnancy is seen as the natural outcome of an egg meeting sperm. However, for some women, it feels as if an unseen force within their bodies repeatedly rejects new life. Xiaoli's journey is a poignant reflection of many with Recurrent Pregnancy Loss (RPL). Married in 2017, she experienced two consecutive first-trimester miscarriages in 2021 (at 7 and 9 weeks), followed by over two years of unexplained infertility. After confirming her fallopian tubes were clear, she sought help at a major Shenzhen fertility center, progressing from ovulation induction to intrauterine insemination (IUI), and finally to in vitro fertilization (IVF).

Yet, fate seemed to play another cruel joke. Two egg retrievals yielded embryos, but both transfers failed. Xiaoli was only 30. Standard tests offered no clear explanation until she consulted Dr. Deng Weifen, Director of Reproductive Medicine at Shenzhen Hengsheng Hospital. There, a profound "dialogue" with her internal microscopic world—reproductive immunology—began.

1. Unraveling the Mystery: The "Immune Battlefield" Within the Uterus

By meticulously reviewing Xiaoli's history, Dr. Deng identified the likely culprit: the immune microenvironment at the maternal-fetal interface. An embryo, carrying paternal genes, is essentially a "semi-allograft" to the mother. Successful pregnancy requires not just a good "seed" and "soil," but precise immune tolerance: the uterus must learn to recognize, accept, and protect this unique "guest."

Targeted tests revealed the hidden roots of her failures:

Chronic Endometritis (CE): Initial hysteroscopy pathology showed CD138+ cells (>5/HPF), confirming CE—a clear "soil" issue impairing implantation.

Endometrial Immune Imbalance: CD56+ cell ratio of 13.73%, significantly above the reference range (<5%), indicated an endometrium in a state of "excessive immune attack," hostile to embryo invasion and placental development.

Macrophage Activation: An elevated CD163+ cell ratio (2.66%) correlated with residual inflammation from CE or a generalized immune-activated state.

Thrombophilic State: Platelet aggregation function (PAgT) at 91.8% signaled a hypercoagulable state, risking placental microthrombi and embryonic ischemia.

Alloimmune Dysregulation: A negative anti-paternal lymphocyte antibody test suggested a lack of protective "blocking antibodies," leaving the embryo vulnerable without immune tolerance.

2. A Functional Medicine Solution: From "Forced Settlement" to "Active Welcome"

Faced with such complex immune dysregulation, no single drug could suffice. Dr. Deng designed an integrated treatment plan based on functional medicine and immunology. The core philosophy shifted from "forcing an embryo into a hostile environment" to "actively remodeling the uterus into a friendly, welcoming home." Key interventions included:

Autologous PBMC Intrauterine Infusion: The patient's own immune cells were harvested and reinfused into the uterine cavity before transfer. This gentle "military exercise" pre-activates the endometrium, promoting the secretion of key cytokines that can "re-educate" aggressive NK cells into a supportive state and directly nourish the embryo.

SGC-PRP Intrauterine Infusion (Novel, upgraded Platelet-Rich Plasma): Utilizing the patient's own blood, this high-purity, acellular preparation enriches the endometrium with growth factors, structurally and vascularly optimizing the "soil."

Intravenous Lipid Emulsion during the Transfer Window: As a safe immunomodulator, this temporarily lowers systemic immune "aggressiveness," creating a precious implantation window.

Following this meticulous preparation to reshape her uterine immune microenvironment, Xiaoli entered a fresh IVF cycle. She obtained one top-grade cleavage embryo and one morula. Through sequential fresh embryo transfer of these two embryos, she achieved a singleton pregnancy. Recently, Xiaoli successfully passed her NT scan, safely navigating through the first trimester.

3. A Beautiful Coincidence: Another Sister's "Delivery" of Joy

On the very day Xiaoli passed her NT scan, a healthy baby boy was born. His mother, Afang, had also suffered repeated miscarriages and IVF failures due to similar immune dysfunction before finding success with Dr. Deng's team.

Afang's path was equally arduous, marked by one failed implantation, one frozen transfer ending in miscarriage, and another in biochemical pregnancy. In-depth investigation revealed her challenges:

·Persistent immune markers: Positive ANA, anti-SS-A/Ro60 antibodies, elevated TNF-α, and chronically high B-cell percentages pointed to systemic immune chaos.

·Endometrial issues: Hysteroscopy indicated thin, uneven, congested lining; recurrent peri-gestational sac fluid; and endometrial microbiota imbalance, compounded by Chronic Endometritis.

·Functional imbalances: Food intolerances (e.g., high sensitivity to dairy) suggested "gut-immune axis" dysregulation. Symptoms like insomnia, fatigue, low mood, and gum swelling indicated chronic inflammation and stress, both fueling and fueled by immune dysregulation.

Through persistent, tailored medication (for immune and inflammatory issues) and lifestyle interventions (addressing food intolerances, sleep, and stress), Afang achieved pregnancy after a transfer in February 2025. Dr. Deng's team provided close monitoring and support throughout her entire pregnancy, until delivery at 36 weeks.

Afang's baby

4. Conclusion: Success Forged by Precision and Perseverance

The successes of Xiaoli and Afang are not mere chance. They are the result of a specialist team armed with deep expertise, a firm commitment to multidisciplinary and functional medicine principles, precise personalized strategies, and relentless dedication. Moving beyond a simple "unexplained" label, the team used comprehensive diagnostics to continuously verify and refine the treatment plan based on each cycle's outcome, ultimately charting a unique "fertility map" for each patient, guiding them toward the hope of a healthy pregnancy.