Early pregnancy has a little pink blood, the progesterone injection, the blood is gone, does not necessarily mean that the fetus is preserved, but also a combination of ultrasound, progesterone and blood HCG (human chorionic gonadotropin) test, and so on. Luteal insufficiency in early pregnancy will cause low progesterone levels, and the symptoms of vaginal bleeding a small amount of pink blood, follow the doctor’s instructions to give progesterone birth control treatment after the bleeding stops, but also to carry out ultrasound examination, when suggesting that the embryo is well developed, and progesterone and blood HCG levels are normal, indicating that birth control is successful, you can continue the pregnancy. However, when the ultrasound suggests that the embryo is underdeveloped and the blood HCG continues not to rise or fall, it mostly means that miscarriage is inevitable and the pregnancy needs to be terminated in a timely manner according to the doctor’s advice. Due to the unstable development of the embryo in early pregnancy, it is necessary to pay attention to proper rest, prohibit coitus, avoid exertion and strenuous exercise, and go to the hospital in a timely manner when there is vaginal bleeding, abdominal pain and other conditions.