Yousiming is the world's largest short-acting oral contraceptive, with good feedback from abroad and many people are using it. It should be regarded as the most advanced short-acting oral contraceptive at present. Compared with other contraceptives, the biggest advantage and uniqueness of Usmin is that it is the first short-acting oral contraceptive that can control weight, that is, it will not cause obesity basically. Generally, oral contraceptives may cause certain water retention, that is, edema, because the estrogen contained in them makes everyone feel as if they are going to get fat after oral administration. However, the progestogen component of Yousiming is very special, called drospirenone, which is the most advanced and natural progestogen component at present. It can effectively resist the water and sodium retention caused by estrogen, so there will be no problem of getting fat.