- 7–10 mm for natural conception
- 7–12 mm for IVF or frozen embryo transfer (FET)
- A triple-line (trilaminar) appearance indicating good receptivity
Overview
A thin endometrium is one of the most common challenges in fertility treatment and IVF cycles. When the uterine lining does not grow beyond 6–7 mm, embryo implantation becomes difficult, leading to repeated implantation failure, IVF failure or difficulty achieving pregnancy naturally.
Subendometrial PRP (Platelet-Rich Plasma) is an advanced, regenerative treatment designed to help women with thin endometrium by improving blood flow, enhancing cell growth and supporting endometrial thickening.
At Zemya IVF & Fertility Clinics, we use highly purified PRP prepared under strict lab conditions. Our fertility specialists have extensive experience in PRP therapy and personalise the procedure based on your endometrial health, cycle phase and treatment goals.
What Is Thin Endometrium?
Thin endometrium refers to a uterine lining that does not thicken adequately during the menstrual cycle. A healthy endometrium is essential for embryo implantation because it provides nutrition, hormonal support and a stable environment for the early stages of pregnancy.
A normal endometrial range includes:
When the lining remains thin, patchy or non-responsive to medication, it may lead to:
- Inability of the embryo to attach
- Low implantation rates
- Recurrent IVF failure
- Biochemical pregnancies
- Higher miscarriage risk
Thin endometrium may occur due to:
- Low estrogen levels
- Poor blood flow to the uterus
- Chronic inflammation or infection
- Previous D&C (dilatation and curettage) procedures
- Repeated abortions
- Intrauterine adhesions (Asherman’s syndrome)
- Uterine scarring from surgeries
- Long-term oral contraceptive use
- Age-related endometrial insufficiency
For women who do not respond well to estrogen therapy or medications like sildenafil, PRP offers a promising solution to regenerate the lining naturally.
What Is Subendometrial PRP?
Subendometrial PRP is an advanced fertility technique where platelet-rich plasma, derived from the patient’s own blood, is injected directly into the endometrium and the subendometrial zone. This targeted technique allows growth factors and healing components to reach deeper layers of the uterus.
PRP contains:
- Platelet-derived growth factor (PDGF)
- Transforming growth factor (TGF)
- Vascular endothelial growth factor (VEGF)
- Cytokines
- Stem-cell attracting proteins
Together, these promote regeneration, angiogenesis (formation of new blood vessels), tissue repair and endometrial thickening.
Unlike basic intrauterine PRP instillation, subendometrial PRP delivers regenerative support directly where the lining needs it most, making it suitable for patients with severe or longstanding thin endometrium.
How Subendometrial PRP Helps in Thin Endometrium
Subendometrial PRP promotes healing and encourages new tissue formation. It also improves blood circulation, which is critical for endometrial growth.
PRP enhances the uterine lining by:
- Stimulating endometrial stem cells
- Encouraging thickening of the lining
- Improving estrogen sensitivity
- Repairing micro-trauma and scarring
- Boosting vascularity and blood flow
- Reducing inflammation
- Supporting the development of a trilaminar pattern
Many women who have undergone failed IVF cycles due to thin lining report better thickness and improved receptivity after PRP therapy.
Who Should Consider Subendometrial PRP?
Subendometrial PRP is recommended for women who have:
- Endometrium consistently below 5–7 mm
- Poor lining development despite estrogen therapy
- Repeated implantation failure
- Recurrent IVF failure
- Low endometrial receptivity scores
- Chronic thin endometrium
- A history of uterine scarring or adhesions
- Chronic endometritis
- Age-related decline in uterine health
- Reduced blood flow to the uterus
It is also highly beneficial for women preparing for frozen embryo transfer (FET) who need a strong, receptive lining for implantation.
How the Procedure Works: Step-by-Step
At Zemya IVF & Fertility Clinics, the procedure is performed in a sterile, controlled environment. The entire process takes 20–30 minutes and is generally well tolerated.
Step 01
Blood collection
A small sample of the patient’s blood is collected for PRP preparation.
Step 02
PRP preparation
Using advanced centrifugation, blood is processed to concentrate platelets while removing unwanted components. This results in highly purified PRP rich in healing factors.
Step 03
PRP activation
The PRP is prepared in a way that maximises growth factor release, enhancing its regenerative potential.
Step 04
Subendometrial injection
Under ultrasound guidance, the PRP is injected into the subendometrial layer using a fine catheter. This ensures precise placement and effective absorption.
Step 05
Monitoring and follow-up
Ultrasound monitoring is done after 48–72 hours to observe changes in endometrial thickness and vascularity.
Many women show improvement within 1–2 sessions, but the number of sessions depends on individual response and cycle pattern.
Benefits of Subendometrial PRP
Subendometrial PRP offers several advantages, especially for women struggling with fertility due to thin lining:
- Helps achieve a thicker, healthier endometrium
- Improves blood flow to the uterus
- Enhances endometrial responsiveness to estrogen
- Promotes the triple-line pattern
- Supports better embryo implantation
- Improves outcomes of embryo transfer cycles
- Reduces inflammation
- Promotes tissue repair and healing
- Safe, natural and biologically compatible
Success Rates, Risks and Safety
Success Rates
For women who have tried multiple cycles without success, PRP can make a significant difference by optimising the uterus for pregnancy.
Success rates of subendometrial PRP depend on several factors including the cause of thin lining, the patient’s age, hormonal balance, underlying medical conditions and the severity of endometrial damage.
Studies report that:
- 60–80% of women show measurable improvement in lining
- Improved pregnancy outcomes in IVF cycles
- Better implantation potential
- Higher success for frozen embryo transfer
Disclaimer: Success rates vary depending on age, medical condition, egg/embryo quality, cause of thin endometrium and overall fertility profile.
Risks and Safety
Subendometrial PRP is considered extremely safe because it uses the patient’s own blood.
Possible mild side effects include:
- Cramping
- Light spotting
- Temporary discomfort
Major complications are rare when performed by trained fertility specialists.
Treatments Often Combined with PRP
To maximise endometrial improvement, PRP may be combined with:
- High-dose estrogen therapy
- Sildenafil (to improve blood flow)
- L-arginine supplements
- Vitamin E
- G-CSF instillation
- Treatment of chronic endometritis
- Hysteroscopic adhesiolysis (if adhesions exist)
- Endometrial scratching in selected cases
- Lifestyle and nutrition support
A combined approach gives better results than any single treatment alone.
Checklist for Consideration
You should consider subendometrial PRP if:
- Your lining does not thicken beyond 6–7 mm
- You have had multiple failed embryo transfers
- Your doctor identifies poor endometrial receptivity
- You have a history of uterine injury or infection
- You are preparing for an embryo transfer cycle
- You want a supportive, regenerative treatment option
Early evaluation is crucial to improve success rates.
Why choose Zemya IVF & Fertility Clinics?
At Zemya IVF & Fertility Clinics, every fertility journey begins with understanding you—your medical history, your goals, and your emotional comfort. Our team creates treatment plans that are tailored specifically to your needs, ensuring clarity, confidence, and personalised attention at every step.
With over 40+ years of combined experience and more than 10,000 healthy deliveries, our doctors bring deep expertise and compassionate care to every case. This dedication is one of the reasons why Zemya IVF is counted among the top 5 IVF and fertility centres in Delhi.
What makes us different?
Personalised care
Every treatment plan is customised based on your reports, health condition, and expectations. You are never given a one-size-fits-all approach—your journey is designed just for you.
Proven expertise
Our IVF specialists and embryologists are internationally trained, highly experienced, and known for handling even the most complex fertility cases with precision and confidence.
Transparent & ethical pricing
No surprises, no hidden charges, and no unnecessary procedures. We explain every test, step, and cost clearly so you always know what to expect.
High-quality, affordable treatment
We believe world-class fertility care should be accessible. You receive the best medical support, advanced treatments, and expert guidance—while staying within a budget that respects your comfort.
Advanced reproductive technology
Our state-of-the-art labs, modern diagnostic tools, and latest IVF techniques are designed to maximise success rates and ensure safe, effective outcomes.
Book a Consultation
If you are struggling with thin endometrium or facing repeated IVF failures, subendometrial PRP could be an important step toward improving your chances of pregnancy.
Book a consultation with our fertility experts at Zemya IVF & Fertility Clinics to understand your endometrial health, explore personalised treatment plans and receive expert guidance for your fertility journey.
Frequently Asked Questions (FAQs)
Subendometrial PRP involves injecting platelet-rich plasma directly into the endometrium and the tissue below it (subendometrial zone). This approach delivers growth factors deeper into the uterus, allowing better healing and regeneration.
Regular PRP infusion is placed only inside the uterine cavity, while subendometrial PRP reaches the layer where new endometrial cells grow, making it more effective for severe thin endometrium.
Yes. Many clinical studies and real-world results show that PRP improves blood flow, stimulates tissue growth and increases endometrial thickness. Women who have struggled with thickness below 6–7 mm often respond well after 1–3 sessions. However, individual results vary depending on age, uterine health and underlying causes.
Most women require 1–2 sessions, while those with severe thin endometrium or uterine scarring may need 3–4 sessions.
Your doctor will decide based on your ultrasound tracking, blood flow, hormone levels and your response to treatment.
PRP is usually performed during the mid-proliferative phase when the lining begins to grow under estrogen support.
However, in certain cases, such as chronic thin endometrium, it may be performed earlier or repeated across cycles to enhance regeneration.
Most women describe the procedure as mildly uncomfortable but not painful. You may feel slight cramping during or after the injection, which settles quickly.
The procedure is well-tolerated and does not require anaesthesia.
Side effects are minimal because PRP is prepared from your own blood. Some mild effects include:
- Light spotting
- Mild cramping
- Temporary discomfort
These usually resolve within a few hours. Serious complications are rare when the procedure is done by a trained fertility specialist.
Many women notice an increase in thickness within 48–72 hours, while others require a few days or a full cycle.
Patients with severe scarring or chronic endometritis may see gradual improvement across multiple cycles.
Yes. PRP has shown positive results in women who have had repeated IVF failures due to poor endometrial receptivity.
By improving the lining quality, triple-line pattern and blood flow, PRP creates a better environment for embryo implantation.
Yes. PRP is safe for women with PCOS, thyroid disorders and other hormonal issues because it uses your body’s own growth factors and does not interfere with hormone levels.
However, your treatment protocol may be customised to your hormonal profile.
Studies show improved implantation and pregnancy outcomes in women with thin endometrium after PRP.
However, success rates vary depending on age, embryo quality, uterine health and the underlying cause of thin endometrium.
Your doctor will guide you with realistic expectations based on your individual case.