A 52-day-old girl died on Friday as her mother reportedly threw her into a pond of Gopinathpur village in Mithapakur upazila allegedly after her husband and his family members were unhappy over her giving birth to the third girl in a row.
Police arrested the mother, Khaleda Begum, wife of Sultan Miah in the area.
Locals found the body floating in the pond adjacent to their house on Friday and informed the police.
Later, police recovered the body and sent it to Rangpur Medical College Hospital morgue for autopsy.
Khaleda Begum gave birth to three girls one after another which made her husband and other family members unhappy, locals said.
Officer-in-charge of Mithapakur Police Station Zafar Ali said during primary interrogation, she confessed to killing her daughter.