Angela Schumann, 28, of Leeds, England, plunged from the Humber Bridge with her daughter, Lorraine Tumalan-Schumann, in June last year.
At the time of the incident the child was just three days short of her second birthday.
A dramatic rescue operation was sparked after a child’s pushchair was found on a bridge walkway and the pair were eventually dragged from water near the south tower after clinging to a life belt.
They had spent 44 minutes in the water.
German-born Schumann pleaded guilty to attempted murder at an earlier appearance at Hull Crown Court.
Judge Michael Mettyear said: “This is one of the most difficult cases I have ever had to deal with.
“It is difficult because on the one hand you are an intelligent woman, you have no previous convictions and you pleaded guilty at the very first opportunity.
“On the other hand your conduct was very likely to kill your child.
“Of the 85 or so people who are known to have jumped off the Humber Bridge I was told that 80 died.”
He said there was evidence to show the act was premeditated, including writing on Schumann’s stomach seen when she was dragged from the water which read: “Cause of death: Julio.”
The court had heard that Schumann’s marriage to her husband Julio Tumalan Nava had broken down in the summer of 2004 and he had later taken custody of the child.