Is low but unresponsive progesterone at 12 weeks pregnant dangerous?

Low progesterone at 12 weeks of pregnancy and no early pregnancy reaction, etc., is dangerous and can easily lead to preterm miscarriage.
A woman is still in the early stages of pregnancy at 12 weeks gestation, when the growth of the fetus in the body is still unstable. The role of progesterone is to prevent the uterus from contracting excessively to stimulate the embryo. If the progesterone is low, it is easy to cause the fetus to be unstable in the uterus, and the pregnant woman will experience symptoms such as back pain and abdominal pain, leading to preterm miscarriage.
Early pregnancy reaction occurs because the elevated level of progesterone in the body produces irritation to the gastrointestinal tract, leading to nausea and vomiting. The stimulation of the gastrointestinal tract is also diminished when progesterone is low, so there will be no noticeable reaction, which is more dangerous.
When a woman is 12 weeks pregnant with low progesterone and not a strong reaction to pregnancy, she should go to the hospital in a timely manner to determine the growth and development of the fetus and prevent miscarriage and other undesirable phenomena from occurring.