Why does bleeding occur when taking progesterone during pregnancy?

Patient's question:

No

Doctor's answer:

If there is a risk of fetal demise or inevitable miscarriage, it is recommended that you undergo hysteroscopic embryo removal while also examining the embryo's chromosomal status and the uterine cavity environment. Post-surgery, identify the causes of infertility and miscarriage. Removing the underlying causes aligns with the principles of eugenics and healthy reproduction.