Infertility OC refers to the ovarian stimulation protocols for in vitro fertilization (IVF), commonly divided into long and short protocols. Ovarian stimulation in IVF is done to obtain more eggs for better results. The choice between protocols is not determined by time, but by assessing the patient’s ovarian function. Patients with good ovarian function use the long protocol, while those with poor ovarian function use the short protocol. Although the long protocol takes more time, it provides better ovulation results and a more consistent ovarian response, preventing premature ovulation. The short protocol, although quicker, often has less effective stimulation results and an inconsistent ovarian response, which frequently leads to premature ovulation. Thus, the long protocol is the standard for ovarian stimulation, while the short protocol is a contingency plan used when there is concern that poor ovarian function might prevent follicle development with the long protocol.