Same as AJ, I used 塞陰道既安胎藥. The doctor said I have 2 choices: visit her once every 2 days for injection, or she gave me the medicine and I apply it by myself. Since I need to stay in bed to rest, the doctor said I'd better choose the 塞陰道既安胎藥.
I suffered from threatened abortion during to 2nd month of pregnancy, my doctor gave me oral intake hormone, the medicine is like a small round ball about 1 cm diameter.