Your BMI falls out of the parameters considered safe for you to undergo Egg Donation.
BMI is a calculation of height to weight ratio. An optimal BMI influences the success of fertility treatments. A BMI outside of the ideal parameters (too high or too low) not only can negatively affect the outcome of fertility treatments but poses safety issues for the potential egg donor, whose safety is of utmost concern.
Please feel free to register again, when your BMI fits the required scale.
To calculate your BMI click here: http://www.bestcalculator.org/miscellaneous/bmi-calculator.php