G-CSF Treatment in IVF

What is G-CSF and How Does it Work?

Successful embryo implantation is one of the most critical stages of in vitro fertilization (IVF). In some women, a thin endometrium may represent a significant obstacle to successful implantation, as the uterine lining does not provide the optimal environment required for embryo attachment and development.

G-CSF (Granulocyte Colony-Stimulating Factor) is a naturally occurring protein that stimulates the production of neutrophils, a type of white blood cell involved in the body’s immune defense. In the field of assisted reproduction, G-CSF has been used as a therapeutic approach to improve endometrial thickness and endometrial receptivity, referring to the ability of the uterine lining to support embryo implantation.

This treatment is mainly applied in women who present with thin endometrium, recurrent implantation failure, or potential immunological factors that may interfere with the implantation process. The goal of the therapy is to create a more favorable endometrial environment that can support successful embryo attachment and development. G-CSF may be administered either intrauterinely (directly into the uterus) or through a subcutaneous injection, depending on the patient’s medical history and the treatment protocol determined by the treating physician.

How It Acts on Endometrial Tissue

The effect of G-CSF on endometrial tissue is immediate and targeted. When injected intrauterinely or administered subcutaneously, G-CSF activates cellular mechanisms that enhance blood circulation, cellular regeneration, and a low-grade inflammatory response, which is considered beneficial for endometrial preparation. These processes contribute to the increase in thickness and functionality of the endometrium, facilitating embryo attachment and increasing the chances of successful implantation. The result is a more “welcoming” endometrium, capable of supporting pregnancy from the critical early stages.

When is G-CSF Infusion Recommended?

Treatment with G-CSF is not applied to all women undergoing IVF, but rather in specific cases where implantation has repeatedly failed or when the endometrium remains thinner than desired.

It represents a targeted option in situations where standard medical preparation is not sufficient to ensure an optimal environment for embryo implantation. The decision to administer G-CSF is made by the fertility specialist after a detailed evaluation of the patient’s medical history and ultrasound findings.

Recurrent Implantation Failure

One of the main indications for the use of G-CSF is recurrent implantation failure, despite the transfer of good-quality embryos. In such cases, the difficulty may not lie in the embryo itself but in the endometrial environment, which may not be sufficiently supportive for embryo attachment.

The use of G-CSF may help modify the endometrial microenvironment, potentially increasing the likelihood of successful implantation in subsequent treatment cycles. The addition of this therapy to the treatment protocol may significantly influence the course of fertility treatment for some patients.

Thin Endometrium (<7 mm)

Another important indication for the use of G-CSF is the presence of an endometrial thickness of less than 7 mm, even after hormonal or medical preparation. A thin endometrium is associated with lower implantation rates, as it may not provide the optimal conditions required for embryo implantation.

In such cases, intrauterine administration of G-CSF aims to improve endometrial vascularization and cellular density, which may contribute to an increase in both the thickness and functional quality of the endometrium. In some cases, the use of G-CSF has been associated with a measurable increase in endometrial thickness within a few days, facilitating the conditions necessary for embryo implantation.

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G-CSF Administration Procedure

The administration of G-CSF is simple but requires proper preparation and medical supervision. It involves three basic stages: preparation, infusion, and post-procedure care. Each phase plays an important role in the safety and effectiveness of the treatment.

Before Treatment (Preparation)

The first step of the process involves a detailed evaluation by the treating physician. At this stage, information is collected regarding the patient’s medical history, current medications, and any previous IVF attempts.

The physician will assess whether G-CSF therapy is appropriate for your case, taking into consideration factors such as endometrial thickness, possible recurrent implantation failure, or other immunological factors that may affect implantation success. Proper preparation is an essential step to ensure both the safety of the treatment and the success of the procedure.

Embryo development in a lab dish, symbolizing advanced IVF techniques including G-CSF for improved endometrial receptivity.

During Treatment (Infusion)

Once the physician approves the treatment, G-CSF administration is performed. The method of administration depends on the specific indication.

In women with a thin endometrium, G-CSF may be administered intrauterinely, meaning directly into the uterine cavity, with the aim of improving endometrial thickness and receptivity. In other cases, where immunological factors associated with recurrent implantation failure are present, the physician may recommend subcutaneous administration of G-CSF.

The procedure is brief and carried out in a controlled medical environment. Most women do not experience pain or significant discomfort during the process.

Happy couple celebrates a positive pregnancy test, reflecting successful IVF results after intrauterine G-CSF infusion therapy.

After Treatment (Monitoring)

After the administration of G-CSF, the treatment continues with careful monitoring by the medical team. An ultrasound examination is usually performed to evaluate the response of the endometrium and to confirm that the desired thickness and appropriate structure for implantation have been achieved.

Depending on the body’s response, the physician may recommend repeating the treatment before embryo transfer to ensure the most favorable conditions for successful embryo implantation.

A newborn’s tiny hand gently holds an adult finger, symbolizing the successful IVF outcome after G-CSF endometrial treatment.

Benefits of G-CSF Treatment & Success Rates

G-CSF therapy is one of the most promising options for women who experience implantation difficulties during IVF. The greatest advantage of the treatment is the improvement of endometrial receptivity, which significantly increases the chances of implantation, especially in cases where previous attempts have failed. Additionally, the enhancement of endometrial thickness and quality provides a more stable substrate to support the embryo during the critical first days.

The application of the treatment is short, painless, and performed without the need for surgical intervention or general anesthesia. It is worth noting that G-CSF is often combined with other supportive therapies, such as PRP, for even greater effectiveness in difficult cases.

Although every body responds differently, studies show that in selected cases, G-CSF can significantly increase implantation rates. That is why it is recommended as a solution for women with a history of repeated failures or inadequate endometrial thickness. The key factor for success remains the personalized evaluation and proper application of the treatment by specialized medical staff.

Frequently Asked Questions About G-CSF Therapy

Is G-CSF treatment safe?

G-CSF treatment is considered safe when applied under the supervision of a specialized doctor. Most women do not experience side effects, and administration takes place in a controlled environment with strict protocols. Your doctor will assess in advance whether you meet the criteria for treatment based on your medical history and any potential drug interactions.

Does G-CSF infusion hurt?

No special preparation is required before the Intralipid infusion, although fasting for a few hours or following doctor’s instructions may be recommended. Allergy screening (e.g., for soy or egg) is also performed, and it’s best to avoid intense physical activity on the day of treatment. Your physician may request a blood test a few days prior to evaluate your general health status.

How quickly are the treatment results visible?

G-CSF’s effect on endometrial tissue is relatively immediate. Typically, within a few days, an increase in thickness and improvement in endometrial quality is observed. The doctor will reassess the findings via ultrasound before proceeding with embryo transfer.

Can the treatment be applied in every IVF cycle?

G-CSF is not applied routinely in every cycle. On the contrary, it is administered in a targeted manner in cases where there is a history of failed attempts or inadequate endometrial thickness. Its application is based on medical criteria and prior evaluation of your body’s response.

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Dr. Chrysostomos Papadopoulos - Specialist in Infertility, Endocrinology & Menopause in Athens

Dr. Maria Oikonomou Obstetrician – Gynecologist

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      EXCELLENT  
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   Μαρια 
 26 days ago
 
 
  The word "thank you" to Dr. Makis Papadopoulos is too small to describe the gratitude we feel for this man. I am pregnant after IVF, having succeeded on the first attempt, and we owe this exclusively to our doctor. First Contact & Communication: From the very first contact, he won us over with his kindness, enthusiasm and willingness to dedicate as much time as we needed. Willing to explain everything in every detail, he solved every question we had in depth — not even a professor to students would analyze them with such patience and contagiousness! Scientific Training: He is an excellent scientist, with deep knowledge of the subject, a perfectionist and focused professional who leaves absolutely nothing to chance. He designed the right treatment for us, solving every problem down to the last detail, making us feel that whatever problem arises, it is certain that it will be solved. HUMANITY & SUPPORT: The most important thing, however, is his humanity. Communication with him was Immediate and he always had as much time as you needed on the phone to solve every question. He showed a deep, real interest, embracing us not just as a doctor, but as if he were our brother. We highly recommend him to every couple starting this journey. He deserves blind trust! We thank you from the bottom of our hearts for the greatest miracle of our lives!

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   Alexandra 
 52 days ago
 
 
  I don't often write reviews, but I feel that Mr. Makis truly deserves it. From the very first moment, he made me feel safe and confident. He listened carefully to what was on my mind, answered every question I had, and explained everything in a simple way, always based on scientific data. Many times, he even sent me relevant scientific studies so that I could better understand why he was suggesting a particular approach. But what stood out to me the most was that he didn't stop at the appointment. He followed up, was genuinely interested in my progress, and was available when I needed him. This is something you rarely encounter. Fortunately, he returned to Greece. He is one of the few doctors who, beyond their knowledge, remain above all human beings. He makes you feel like he sees you as a person and not as just another incident.

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   Matina 
 69 days ago
 
 
  A big thank you to Dr. Makis Papadopoulos who supported us from day one, who checked every little detail, who explained to us every move-step, every test, every medication for the reason we were doing it and what we would achieve. With incredible experience, knowledge, a lot of patience (because we had two other failed attempts with another doctor) and trust, within 8 months he adapted the protocols for our case and we achieved the positive result and we hold in our arms a priceless diamond. Above all, a rare person, calm and always available to listen to our concerns and reassure us. I highly recommend him!

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   Eva 
 93 days ago
 
 
  Thanks to Dr Makis Papadopoulos, I am now holding my two beautiful babies in my arms! He is a true expert. Professional with a human centric approach, friendly and empathetic, always available to answer our (many many) questions. I trust Dr Makis blindly and, honestly, I cannot recommend him enough!
  
 
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   Ivy 
 100 days ago
 
 
  My experience with Dr. Makis took me from a clinical stagnation to an incredible breakthrough, highly recommend Dr. Makis! Navigating the exhausting world of IVF, you know how devastating it is to watch your protocol dosages go up while your results go down. After three intense, high-dosage cycles with a previous clinic, I was left feeling incredibly discouraged. Despite escalating medications and growth hormones, my blastocyst yield was dwindling, culminating in a heartbreaking round with zero blastocysts. I knew I needed a doctor who didn't just follow a standard script, but who truly understood the nuances of egg quality and customized protocols. That is when I found Dr. Makis. Dr. Makis completely revolutionized my treatment plan. Instead of just pushing maximum dosages, he took a highly strategic, tailored approach. The result? Quality over pure protocol size. While my previous doctors kept increasing the medication dosages (which yielded fewer or zero blastocysts), Dr. Makis completely changed the strategy. He lowered the heavy stimulation, introduced smart egg-quality support (like melatonin), changed the protocol style entirely, and achieved a 700% increase in blastocysts compared to my best previous rounds. Beyond the incredible results, Dr. Makis brings a level of expertise, precision, and reassuring care that is rare to find. He looks at you as an individual, not a statistic, and knows exactly how to pivot when traditional routes fail. If you are looking for a specialist who can turn a difficult prognosis into an overwhelming success, look no further than Dr. Makis. I am incredibly grateful for his care.
  
 
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   Olga 
 111 days ago
 
 
  Dr. Makis Papadopoulos was excellent, professional, and very reassuring throughout the entire process. Thanks to his expertise and guidance, we were able to identify the issue early and take the appropriate steps from the beginning. He took the time to explain everything clearly, answered all our questions with patience, and made us feel comfortable and confident throughout our journey. We truly appreciated his caring approach, professionalism, and dedication. Highly recommended!
  
 
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   Euaggelia 
 122 days ago
 
 
  Dr. Makis Papadopoulos is an excellent scientist and above all a rare person! He is an approachable and smiling doctor, with excellent medical knowledge, who from the first moment I met him made me feel comfortable and trust him completely, answering every question I had with patience and documenting every answer with scientific studies and articles! The most important thing, however, is that Dr. Makis Papadopoulos is always there on the other end of the line to listen to you and reassure you without a trace of haste, a doctor who truly cares and makes you feel like he is your own person! Makis, thank you very much for everything!!! I am very lucky to have met you!

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   Anastasia 
 129 days ago
 
 
  Dr. Makis Papadopoulos is an excellent scientist with a human-centered interest. Our collaboration was excellent from the very beginning and he made me feel confident and secure by explaining every step of the process in great detail. I highly recommend him!

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   Fay 
 131 days ago
 
 
  Dr Makis Papadopoulos is very professional, caring and attentive. Very thorough in explaining the whole process throughout every step. Thank you! Highly recommended!!
  
 
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   Christina 
 134 days ago
 
 
  I would like to share my experience with Dr. Makis Papadopoulos, an outstanding gynecologist and scientist. We first connected in the summer of 2024, while he was based in Germany, through a mutual acquaintance, following a particularly challenging period for us. Prior to meeting him, we had gone through repeated unsuccessful attempts of stimulation and fertilization with other gynecologists. Unfortunately, those approaches relied largely on standardized protocols, without sufficient personalization to address the specific needs of my case. From the very beginning, Dr. Makis stood out for his human-centered approach and his willingness to dedicate time to truly understand our situation in depth. With strong, up-to-date scientific knowledge, he approaches every case holistically, focusing on individualized treatment and adapting protocols to the patient's unique needs. Throughout our collaboration, which now spans approximately two years (with a few breaks on our side), he has consistently been available, supportive, and clear in his guidance. He inspired confidence and helped us stay positive even during difficult phases of the journey. Beyond his scientific expertise, what truly sets him apart is his genuine care for the person behind each case: his empathy, honesty, and continuous effort to achieve the best possible outcome. My husband and I are deeply grateful for his support and guidance, and we now feel ready and optimistic to move forward to the next final stage. We highly recommend him to anyone seeking a gynecologist with true expertise, professionalism, and compassion. I would like to share my experience with Dr. Makis Papadopoulos, an excellent gynecologist and scientist. We met in the summer of 2024, when he was in Germany, through a mutual acquaintance, after a particularly demanding period for us. Before meeting him, we had gone through repeated failed attempts at stimulation and fertilization with other gynecologists. Unfortunately, the approaches that had been followed were mainly based on standardized protocols, without the necessary individualization to the specifics of my case. From the beginning, Dr. Makis stood out for his human approach and his willingness to spend time to understand our case in depth. With modern knowledge and scientific training, he approaches each issue multidimensionally, emphasizing the individualization of treatment and adapting the protocols to the real needs of the patient. During our collaboration, which now spans about two years (with short breaks on our part), he was always available, supportive and clear in his guidance. He inspired confidence in us and helped us remain optimistic even in difficult phases. In addition to his scientific competence, what sets him apart is his genuine interest in the person behind each case: his empathy, his honesty and his constant effort to achieve the best possible outcome. My husband and I thank him warmly for his support and guidance and we now feel ready and optimistic to move on to the next final stage. We highly recommend him to anyone looking for a gynecologist with real knowledge, professionalism and humanity.

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   Faidra 
 135 days ago
 
 
  Dr. Makis Papadopoulos is an excellent gynecologist and above all an excellent person! I truly thank him for his support and care during the egg freezing process. Although my case was particularly demanding, he stood by me with patience, knowledge, great experience and real interest. Our communication was direct and human, while his availability at the many appointments made me feel safe at every step. The protocols were designed specifically for me, aiming for the best possible result, while also taking into account the cost of the medications. I recommend him with all my heart to every woman who wants to trust someone for something so important and sensitive for her.

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   Iliana 
 137 days ago
 
 
  I highly recommend Dr. Makis, he is an incredible specialist. My journey was far from easy, encountering several challenges that  made the process feel overwhelming at times. What sets him apart is his willingness to go beyond standard procedures. He developed a specialized, custom protocol, tailored to my situation, which ultimately made all the difference. Beyond his technical expertise, his calm and clear communication kept me grounded throughout the process. I am so grateful for his persistence and high level of care!

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