Patients undergoing the first-time IVF treatment cycle using either conventional insemination technique or intracytoplasmic sperm injection at Queen Mary Hospital will be invited to participate in this study. Participating subjects will be randomized into either (i) AFC or (ii) AMH group, where the gonadotrophin dosing will be determined based on the baseline AFC and serum AMH respectively as assessed one month before the IVF treatment. Randomisation will be performed according to a computer-generated list which will be read by an independent research nurse. That research nurse will assign the initial gonadotrophin dose according to the study protocol.