With poor ovarian function, an IVF antagonist protocol is more appropriate. The antagonist protocol and the long protocol are the two most common protocols used in IVF. The antagonist program and the long program are suitable for different types of women undergoing IVF. The antagonist program is suitable for a wide range of people and is suitable for almost all people. The antagonist program has a shorter cycle time and is less expensive, but the number of eggs acquired by the ovaries is smaller and the incidence of ovarian hyperstimulation is low. The long regimen is suitable for younger patients with better ovarian function. The long regimen has a longer dosing cycle time and is more expensive, but the number of eggs gained by the ovaries is larger and the incidence of ovarian hyperstimulation is high. With poor ovarian function, an in vitro antagonist regimen is usually chosen.