Is it serious if there is bleeding below during the early stages of pregnancy?

Patient's question:

Early pregnancy bleeding

Doctor's answer:

Miscarriage
1. There are several causes of miscarriage, mainly including:
① Genetic defects that prevent the embryo from developing normally; excessive exposure to harmful chemicals (such as arsenic, benzene, formaldehyde, ethylene oxide, etc.) and physical factors (such as radiation, noise, and high temperatures) can lead to miscarriage.
② Severe systemic diseases in the mother, genital organ malformations or tumors, or endocrine disorders can also cause miscarriage.