In most cases a poor responder diagnosis is discovered after going through an IVF cycle resulting in a poor stimulation outcome. However, it is possible to identify potential issues ahead of time through ovarian reserve testing. This can be done through having a provider ideally a fertility specialist, check the FSH levels and conducting the clomiphene challenge test. An ultrasound assessment can help predict both resting and antral follicle numbers. There is one last test that can help determine if a person will be a poor responder and that is cycle day 3 blood testing of the Inhibin B levels.