BMI Requirements for Egg Donation: What Donors Need to Know

Key Takeaways

• BMI is one of several health factors considered during egg donor screening.
• Clinics use BMI guidelines to protect donors’ safety and support successful outcomes.
• Having a higher or lower BMI doesn’t define your health — it’s simply one measure used for medical safety.
• If your BMI is outside the typical range, a fertility specialist can help you understand your options.

Why Clinics Have BMI Guidelines

When screening potential egg donors, fertility clinics look at a range of health factors, including age, medical history, lifestyle, and Body Mass Index (BMI). These criteria help ensure the donation process is safe for the donor and successful for the intended parents.

Most clinics accept donors with a BMI over 18 and under 30. This guideline doesn’t necessarily reflect the potential donor’s health; it’s based on how the body responds to medications used during ovarian stimulation and the egg retrieval procedure. A BMI within 18 to 30 can lower medical risks such as complications with sedation, difficulty with ultrasound imaging, or changes in how the body processes fertility medications.

In other words, BMI is used as an indicator to keep you safe. It’s not a reflection of your value, health, or worthiness to give the gift of donation.

How BMI Affects Ovarian Stimulation

Ovarian stimulation is the process that allows several eggs to mature at the same time for retrieval. The stimulation medication dosage is carefully adjusted for each donor. When BMI is higher, it can sometimes change how these medications are absorbed and how the ovaries respond.

Because of this, clinics set BMI ranges to help keep hormone levels stable and predictable, reducing side effects and supporting the best possible outcome for everyone involved.

If your BMI falls outside the clinic’s range, that doesn’t mean there’s anything wrong with you— it just means the medical team is focused on minimizing risk and ensuring each donor’s treatment is safe and effective.

Can You Adjust BMI to Qualify?

Yes. Some donors choose to make small, sustainable lifestyle changes, such as gentle exercise or nutrition adjustments, to bring their BMI within the required range. If you’re considering this, talk with a healthcare provider before making changes.

Even after BMI is within range, your overall health, genetic screening, and emotional readiness are all part of the approval process. The clinic’s team will guide you through each step and help you understand what’s needed to qualify safely.

A Compassionate Approach to Screening

Every potential donor deserves to feel respected and supported. The screening process isn’t about perfection — it’s about ensuring your safety and helping hopeful parents build their families with confidence.

If you’re unsure whether you qualify or have questions about BMI guidelines, reach out to San Diego Fertility Center. Their team can walk you through the details, explain your options, and help you decide if egg donation is right for you.

FAQ

Why is BMI important for egg donation?

BMI helps fertility specialists tailor medications safely and reduce the risk of side effects or complications during stimulation and retrieval.

Can I donate if my BMI is slightly outside the range?

Each clinic has its own policies. If your BMI is slightly outside the preferred range, it’s best to speak directly with your fertility team — they’ll help you understand your options and next steps.

Clinically reviewed by Alyssa Schoenemann, RN