Respected Madam,
Hair loss can be due to various factors, few of which can be summarized under the following:-
1. Local or factors related to the skin
2. Systemic or Generalized- diseases like
thyroid or other endocrine disorders, anaemia, etc.
3. Undue emotional stress or pressure- work, depression,
4. Physical stress like heavy exercise, fever, in your case abortions etc.
5. Post-delivery etc.
Next Steps
Please consult a dermatologist for proper assessment so that he or she may guide you