What are the reasons for the unfertilized egg not dividing?

Patient's question:

No

Doctor's answer:

The causes of fetal demise include:
1. Genetic gene defects, chromosomal abnormalities;
2. Maternal factors, such as severe systemic diseases during pregnancy, reproductive organ abnormalities, endocrine disorders, excessive smoking, alcohol consumption, trauma, and shock;
3. Immune function abnormalities;
4. Environmental factors, such as excessive exposure to chemicals.