• Severe pain in the abdomen.
• Vaginal bleeding in early and advanced pregnancy.
• Convulsions.
• Generalised weakness, easy fatigability, and breathlessness.
• Excessive swelling in legs.
• Fever.
• Foul-smelling leaking with or without fever.
• Burning micturition – burning sensation with urination.
• Excessive nausea and vomiting.
• Leaking per vaginum before onset of labour.
• High blood pressure detected in Antenatal care.
• Fainting.
• Decreased or no foetal movements.
• Swelling all over body, palpitations, shortness of breath.
• Blurring of vision.
• Labour pains more than 12 hours.

Ref – http://nhm.gov.in/images/pdf/programmes/maternal-health/guidelines/my_safe_motherhood_booklet_english.pdf