The quick answer

You can decide whether or not to donate, but you cannot reliably choose an exact number of eggs that will be collected. Ovaries respond differently to stimulation, and the final number of mature follicles cannot be predicted in advance.

Why the number varies

Your age, ovarian reserve, baseline follicle count, medication dose and individual response all influence how many follicles grow. Two donors on similar medication can produce very different numbers of mature eggs.

The goal is not “as many as possible”

A safe cycle aims for an appropriate response while reducing complications. Pushing medication doses solely to maximise egg numbers can increase the risk of ovarian hyperstimulation syndrome and other problems.

Monitoring guides the plan

Ultrasound scans measure follicle growth. Your clinic may alter medication, change the trigger plan or cancel a cycle if your response is unexpectedly high or low. Those decisions should prioritise your safety.

Can you set limits before treatment?

You can always ask how the clinic approaches high ovarian response and what would happen if you became uncomfortable continuing. Consent is ongoing. You have the right to ask questions and to withdraw before treatment reaches a point where withdrawal is no longer clinically or legally possible.

Oocyt perspective

A good donor programme should never make you feel that your value is measured by the number of eggs retrieved. The safest successful cycle is the goal.