The Fertility Notes
Clear, global fertility knowledge in one calm place.
Follow fertility news, compare Korea best IVF doctors, read fertility reports, and explore practical Korea guides in one calm reference library.
Fertility News
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“Normal AMH but Sudden Menopause?”… Premature Ovarian Insufficiency (POI) Halts Ovarian Function Before 40: Who Is Affected?
“My AMH is low—does that mean I’ll go through menopause soon?” When told that their “ovarian function is declining” during a fertility evaluation, women often feel mounting anxiety. In particular, when Anti-Müllerian Hormone (AMH) levels are low, it is easy to assume that “very few eggs remain” or that “early menopause is approaching.” The reverse…
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“Why Does Implantation Fail Even with a 10mm Endometrium?”… The True Capability of the Endometrium Beyond Thickness
“Why Does Implantation Fail Even with a 10mm Endometrium?”… The True Capability of the Endometrium Beyond Thickness Thickening Alone Is Not Enough for an Embryo to Attach… Endometrial Cells Must Transform into ‘Tissue for Pregnancy’ New Molecular Pathway Discovered in the Endometrium of Recurrent Implantation Failure Patients… Another Step Forward in ‘Endometrial Quality’ Research “The…
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“Should You Take Antibiotics If You’re CD138-Positive?”… Rigorously Tested in Women with Recurrent Miscarriage
438 Women with Recurrent Miscarriage and Confirmed Chronic Endometritis Randomized… Head-to-Head Comparison of Doxycycline vs. Placebo Live Birth or Pregnancy Continuation Beyond 24 Weeks at 52% vs. 50%… No Antibiotic Benefit Confirmed CD138 Levels Changed Similarly in Both Antibiotic and Placebo Groups… Calling the ‘CD138-Positive → Antibiotics’ Formula into Question There is a diagnostic test…
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“Does an Endometrioma in One Ovary Mean Fewer Eggs?”
Direct Comparison Between the Affected Ovary and the Intact Contralateral Ovary: ‘No Significant Difference’ in Retrieved Oocyte Count Comprehensive Analysis of 13 Studies: Mature Oocytes and Good-Quality Embryos Also Similar, Though Total Embryos Formed Decreased Researchers: “Particularly for Small Endometriomas, the Need for Surgery Prior to IVF Must Be Weighed Carefully” Ahead of fertility treatment,…
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“Finding ‘Viable Embryos’ Without Touching Them with a Needle?”… The Clues Left in a Single Drop of Culture Medium
Embryo selection in In Vitro Fertilization (IVF) is expanding beyond “inspecting the embryo itself” to “decoding the molecular footprints it leaves behind.” A study published in Reproductive BioMedicine Online (RBMO) explored whether analyzing trace molecules within the droplets of fluid left after culturing human embryos can predict which embryo is most likely to result in…
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“Every Egg Is Precious, So Shouldn’t We Do ICSI?”… The American Society for Reproductive Medicine Disagrees
“We only retrieved two or three eggs. What if none fertilize with conventional insemination? Wouldn’t it be far safer to perform microinjection on every single one?” For patients undergoing In Vitro Fertilization (IVF), the anxiety surrounding fertilization failure escalates dramatically when oocyte yield is low. For women with diminished ovarian reserve or advanced maternal age,…
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“Why Did Birth Rates Fall Even After Selecting ‘Euploid’ Embryos?”… Long-Standing Debate Over PGT-A Re-Ignites
To couples undergoing In Vitro Fertilization (IVF), few options sound as intuitively reassuring as selecting a “chromosomally normal embryo” for transfer. Preimplantation Genetic Testing for Aneuploidy (PGT-A) screens embryos for numerical chromosomal abnormalities before intrauterine transfer, allowing clinicians to prioritize euploid embryos. The working assumption seems straightforward: if you screen out aneuploid embryos and transfer…
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“Is It Over Even for Euploid Embryos After Three Failures?”… Tracking Up to Six Consecutive Transfers
“Is It Over Even for Euploid Embryos After Three Failures?”… Tracking Up to Six Consecutive Transfers “PGT-A confirmed my embryo was chromosomally normal, but it has already failed to implant twice. Could there be an underlying uterine issue?” This is an increasingly common concern across fertility forums. When an embryo confirmed to have a normal…
Korea Best IVF Doctors
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“Minimum Stimulation, a Method Close to Nature… Focusing on Safety and Quality”
Dr. Lee Kyung-ho’s Principles of Fertility Treatment, Aspiring to Be the ‘Dr. Kato’ of Korea Operating a fertility clinic in Ulsan, Dr. Lee Kyung-ho—director of Mama Papa & Baby Obstetrics and Gynecology—sent an email a decade ago to a Japanese physician revered as a legend in the global reproductive medicine community. The recipient was Dr.…
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Korea’s Top Expert in Finding Sperm: The Last Hope for Male Infertility, Urologist Dr. Seo Joo-tae
Male Infertility Specialist: Dr. Seo Joo-tae, Urologist “Even Azoospermia Patients Can Have Children” Dr. Seo Joo-tae Male factors account for 40% of all infertility cases. Male infertility causes are diverse, ranging from simple sperm disorders like low sperm count or poor motility, to genetic factors like chromosomal abnormalities, and problems with sperm production due to…
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Top IVF Specialists in Korea (Part 2) – Dr. Cho Jung-hyun: A Master of Endometriosis Treatment
Jung-hyun Cho, MD — Sarang I Women’s Clinic. Draft directory profile with public search review notes; pending official verification.
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Top IVF Specialists in Korea (Part 1) – Dr. Lee Sung-goo: Surpassing 90,000 IVF Cases
Public-source profile for Seong-gu Lee of Daegu Maria Clinic.
Fertility Report
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“The Same Stimulation Injections, Yet Why 15 Eggs for One and 3 for Another?”
“The Same Stimulation Injections, Yet Why 15 Eggs for One and 3 for Another?” When starting In Vitro Fertilization (IVF), nearly every woman becomes intimately familiar with ovarian stimulation injections. Administering a shot into the abdomen at the exact same hour each evening, she returns to the clinic days later to watch dark, circular follicles…
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“They Found Something on My Ovary”… From Simple Water Cysts to Chocolate Cysts, Teratomas, and Cancer: A Complete Guide to Ovarian Lesions
When a physician pauses during a pelvic ultrasound and mentions, “There is something visible on your ovary,” many women immediately fear the worst: cancer. In reality, lesions discovered in the ovary span a far broader and more nuanced spectrum. Some are simple fluid-filled water cysts that emerge during this month’s ovulation only to resolve by…
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“It Wasn’t Just the Egg Aging… The Follicle’s ‘Power Plants’ Are Powering Down”
As maternal age advances, the quantity of remaining oocytes declines and the rate of chromosomal aneuploidy rises. Historically, ovarian aging has been framed almost exclusively around these two hallmarks. However, recent research looks deeper into the follicle, demonstrating that the cellular energy infrastructure of the somatic cells surrounding and nourishing the egg undergoes profound age-related…
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“A 28-Day Cycle Means Ovulating on Day 14?”… The Female Body Does Not Run on a Calendar
If a woman has a 28-day menstrual cycle, does she ovulate exactly on Day 14 after the start of her period? This is a calculation virtually every woman attempting to conceive has performed at least once. However, the female body does not operate like a rigid calendar. Even women with relatively regular cycles can ovulate…
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“The Liquid Where Embryos Spend Five Days: How Much Do We Really Know?… The Secrets of IVF ‘Culture Medium’”
“The Liquid Where Embryos Spend Five Days: How Much Do We Really Know?… The Secrets of IVF ‘Culture Medium’” Examining Commercial Culture Media: Formulations Differ by Product… Over 700 Unlisted Human Proteins Detected in Unused Media Protein Compositions Vary Even Within the Same Product Depending on Manufacturing Lots… ‘Albumin’ Emerges as the Key Variable 2026…
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“Good Embryos Leave Traces in Culture Medium”
Reading ‘Childbirth Potential’ Through Embryo Metabolites 173 Metabolites Detected in Spent Culture Medium… 10 Differed Based on Live Birth Outcomes Live Birth Discrimination Model Achieves AUC of 0.834… The Promise of ‘Non-Invasive Selection’ Without Touching Embryos Moving beyond the traditional practice of selecting high-quality embryos based solely on visual morphology under a microscope, recent research…
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“Should We Build the Endometrium with Medication or Wait for Natural Ovulation?”… Results of a Randomized Trial of 561 Women Undergoing Frozen Embryo Transfer
Women preparing for a Frozen Embryo Transfer (FET) often face a difficult question: “Should I wait until I ovulate naturally before transferring the embryo?” “Or is it better to use estrogen and progesterone to prepare the uterine lining and schedule the transfer date?” A randomized controlled trial conducted across 5 fertility centers in Belgium involving…
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“Inserting a Balloon Into the Uterus?”
Women Who Need to Widen the ‘Narrow Path’ Before IVF “We need to place a balloon inside the uterus to widen the path a bit.” When an infertile patient preparing for In Vitro Fertilization (IVF) hears these words, initial panic is entirely understandable. Does it mean putting a balloon inside the uterus and inflating it?…
Male Infertility
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“An Unexpected Combination Damaging Sperm DNA… Different in ‘Obese Men’”
Analysis of 5,032 Men Undergoing Fertility Evaluation: Higher Serum Homocysteine Correlates with Increased Sperm DNA Fragmentation Highest Group Exhibited 20.25% with ‘DNA Fragmentation ≥ 30%’ vs. 10.53% in the Lowest Group Even at Equivalent Homocysteine Levels, Association Stronger in Obese Men… “Not a Study Proving Cause and Effect” Some men present with normal sperm counts…
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“Found the Reason Why Sperm Cannot Be Produced?… Clues Discovered in the Genes of 2,028 Azoospermia Patients”
Elucidating the Operating Mechanism of ‘Spermatogonial Stem Cells’ That Continuously Produce Sperm SMC1A Interacts with YBX1 to Sustain HMGA2 Activity Variants Identified from Genetic Analysis of 2,028 Non-Obstructive Azoospermia Patients Not Yet at the Diagnostic or Therapeutic Stage, but Provides Fresh Clues for Uncovering the Causes of Male Infertility How can a man’s testes continuously…
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“If I Have Azoospermia, Will Surgery Retrieve Sperm?… Can a Blood Test Tell in Advance?”
Blood Analysis of 60 Men with Non-Obstructive Azoospermia: RNA Signals Linked to micro-TESE Success Identified Focus on INPP1, GTSF1, and Regulatory RNAs… Select Biomarkers Reach an AUC of 0.97 Researchers: “Candidate Non-Invasive Biomarkers Predicting the Likelihood of Sperm Presence Prior to Surgery”… Not Yet at Clinical Application Stage When men receive a diagnosis of ‘azoospermia’—where…
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“When Men Were Given Letrozole… Sperm Began to Appear Again”
Letrozole, Known as a Female Ovulation Inducer, Shows Potential for Male Infertility in RCT 296 Men with Spermatogenic Dysfunction Treated for 3 Months… Sperm Concentration Stage Improvement of 14.3% vs. 5.4% Sperm Identified in Ejaculate of Some Azoospermic Men… Though It Does Not Mean ‘Sperm Counts Increased Dramatically’ To couples undergoing fertility treatment, ‘letrozole’ is…
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“Should You Immediately Opt for ICSI If Sperm DNA Damage Is High?”… IVF vs. ICSI Outcomes Diverge Based on DFI
“Our sperm count and motility look acceptable, but the DNA fragmentation rate came back elevated. Should we jump straight to intracytoplasmic sperm injection (ICSI) from the start?” This is a recurring dilemma for couples navigating assisted reproductive technology. A routine semen analysis evaluates parameters like total concentration, progressive motility, and normal morphology. However, even if…
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“50 Points Last Time, but 12 Points This Time?”… Why Semen Analysis Report Cards Fluctuate
“Last time, motility was over 50%, but this time they say it is under 20%. Did my sperm suddenly deteriorate?” This is one of the most common questions couples ask when reviewing semen analysis results during fertility evaluations. Even when the same man undergoes testing within a relatively short window, the reported sperm count and…
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“Sperm Do Not Live Alone… The ‘Seminal Microbiome’ Emerges as a New Variable in Male Infertility”
“Sperm Do Not Live Alone… The ‘Seminal Microbiome’ Emerges as a New Variable in Male Infertility” Some men present with low sperm counts or poor motility despite exhaustive diagnostic evaluations that yield no identifiable cause. Endocrine profiles are normal, varicoceles are absent, and there are no structural chromosomal abnormalities or active clinical infections. This condition…
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“It Was ‘Obesity Itself’ That Reduced Sperm Count… When Combined with Hyperglycemia, Sperm DNA Was Also Compromised”
“It Was ‘Obesity Itself’ That Reduced Sperm Count… When Combined with Hyperglycemia, Sperm DNA Was Also Compromised” When men undergo a fertility evaluation, the first numbers they typically look at are sperm count and motility. The focus almost always centers on how many sperm there are, how well they move, and what percentage have normal…
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