What is the exact age range for egg donors and why is it so strictly enforced?

Egg donors must be exactly 21-28 years old as of their application date. This strict age range is enforced for critical medical and legal reasons: peak fertility occurs between ages 20-29 with highest egg quality and quantity, FDA regulations require donors to be 21+ for informed consent, success rates decrease significantly after age 28 with lower AMH levels and increased chromosomal abnormalities, legal liability protections for clinics and agencies require adherence to ASRM guidelines, insurance coverage typically follows these age restrictions, and international shipping regulations often have age-based requirements. No exceptions are made regardless of circumstances.