if you have a bleeding, call your OB right now.He willl tell you which kind of test is necessary. I have a bleeding and then got a blood test. It says my 黄体酮 is 10 and the normal value is 20. Then I get a prescribed medcine. After 3 pills, the bleeding stops. But be sure to ask the OB's suggestion before you take any medcine when you are pregnant.