The incident occurred yesterday afternoon at a flat situated on VSNL road in Kakkanad near here.
Megha fell while trying to reach the balcony to rescue her son who was locked inside the flat after she had stepped out to dispose the waste in a bin, they said.
Megha had failed to open the automatic door with the biometric system after it was closed due to wind when she came out.
Security guards rushed her to the hospital, but she lost her life enroute, police said.
The child was later rescued by the fire and rescue services personnel.
Her husband was away at work when the incident occurred, they added.
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