Is doctors ability to stop a threatened miscarriage dependent on the gestational age? is it ever so early in a pregnancy that it is not possible to save the embryo once the mother presents with symptoms of a threatened miscarriage?

Miscarriage ?'s: A "threatened miscarriage" is generally a term used for bleeding in early pregnancy. Progesterone is initially made by the ovary, but at 7-9 weeks of pregnancy, the placental makes progesterone, and it may be at a lower level, causing bleeding. A physician can prescribe oral progesterone, which can preserve the pregnancy in some instances. Most miscarriages are not preventable.