Is 40mg of progesterone injection a large dose to preserve the fetus?

A dose of 40 milligrams of progesterone per use is not very large.
Progesterone injections are 10 mg, 20 mg, 40 mg, and even 60 mg. Different situations need to be decided based on test results and previous medical history, so 40 mg at a time is not a lot.
If the test shows a low progesterone value, a past history of miscarriage or current symptoms of miscarriage, it is recommended that appropriate color Doppler ultrasound and blood tests be performed promptly in the hospital. Depending on the test results, appropriate oral birth control substances or progesterone injections should be given as prescribed by the doctor.
During pregnancy, you need to have regular checkups, pay attention to rest, keep warm, avoid fatigue, avoid anger, take oral folic acid, and if you have symptoms of abdominal pain and vaginal bleeding, go to the hospital for checkups at any time.