BMI guidelines are determined by IVF physicians, not by surrogacy agencies. Each fertility clinic has its own medical criteria to ensure a safe and healthy pregnancy for both the surrogate and the baby.
Surrogacy Eligibility Tool
BMI Calculator for Surrogacy
Check your BMI to see if it meets the clinical standards set by IVF doctors. Most fertility clinics prefer a BMI of 30 or below for gestational carriers.
BMI Calculator
Check if your BMI meets surrogacy eligibility requirements.
calculators.bmi.yourResult—
| Category | BMI Range |
|---|---|
| Underweight | < 18.5 |
| Healthy | 18.5 – 24.9 |
| Overweight | 25.0 – 29.9 |
| Obesity | 30.0+ |
How This Calculator Works
BMI = weight (kg) ÷ height (m)²
- Standard entries (feet/inches & pounds) are automatically converted to metric values during calculation. Height and Weight Converter
- Results are shown to one decimal (cut-offs at 18.5, 25.0, 30.0).
- BMI estimates body size — it doesn't measure body fat, muscle mass, or fitness.
Maintaining a balanced BMI helps IVF doctors assess pregnancy readiness and minimize risks during surrogacy.
Understanding Your Result
Your BMI result offers a general picture of body size based on height and weight — but it does not measure body composition or health status directly.
A slightly higher BMI doesn't automatically mean you're unhealthy or ineligible. Doctors look at many other factors — such as blood pressure, lab results, and pregnancy history — to form a complete view of your health.
Review the full surrogate eligibility criteria — your previous pregnancy history, lifestyle, and overall health are equally important. full surrogate eligibility criteria
BMI & Surrogacy Requirements
Most fertility doctors in the United States prefer a BMI of 30 or below for gestational carriers. This standard reflects clinical data linking higher BMIs with increased risks such as gestational diabetes and hypertension.
Medical Guidelines
These are medical guidelines, not agency rules. Some IVF physicians may accept candidates with a BMI up to 32, depending on overall health and previous pregnancy outcomes.
Clinic's Decision
Ultimately, it's the IVF clinic—not the agency—that makes the final medical determination of eligibility.
For Surrogates
If your BMI is slightly above 30, don't lose hope.
Many successful gestational carriers began their journeys after making small, healthy changes.
- Focus on gradual, sustainable improvements in daily activity and nutrition.
- Work toward your clinic's guideline — most prefer ≤ 30; some may consider up to 32.
When you're ready, apply and our coordinators will align your timeline with clinic requirements.
For Intended Parents
It's common to wonder whether a surrogate's BMI could affect IVF success.
In practice, each IVF clinic sets and enforces its own medical standards, including BMI limits, to ensure a safe and healthy pregnancy.
You don't need to monitor a surrogate's BMI yourself — simply follow your fertility clinic's guidance and rely on its thorough screening process.
Gestational Carrier BMI: Why You Don't Need to Worry Too Much
BMI and Surrogacy: Frequently Asked Questions
1. Who sets the BMI requirement for surrogacy — the agency or the doctor?
2. What BMI is required to become a gestational carrier?
Most IVF doctors in the U.S. prefer a BMI of 30 or below for surrogates. Some clinics may consider candidates with a BMI up to 32, depending on their health history and previous pregnancy outcomes.
3. Why do IVF doctors care about BMI?
BMI can influence hormone balance, embryo implantation, and pregnancy stability. A moderate BMI helps create the safest environment for both the surrogate and the baby.
4. Can I still qualify if my BMI is above 30?
Possibly. If your BMI is slightly above 30, your IVF doctor may suggest simple lifestyle adjustments and re-evaluation after a few months.
5. Does BMI affect surrogate compensation or matching?
BMI itself does not determine compensation. However, meeting the medical standards set by the clinic is required before being approved and matched with intended parents.
6. Do intended parents need to worry about their surrogate's BMI?
No. The surrogate's medical eligibility — including BMI — is assessed and approved by the fertility clinic before any match is finalized.
7. What if my BMI recently changed due to weight loss or postpartum recovery?
If your current BMI is now within the medical guideline range, you can move forward with the matching process.
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BMI Calculator
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Height & Weight Converter
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Ready to Begin Your Surrogacy Journey?
Whether you're looking to become a surrogate or start your family through surrogacy, we're here to guide you every step of the way.
This calculator provides educational estimates only and should not be considered medical advice. Results may vary based on individual circumstances. Always consult with your healthcare provider for personalized medical guidance.