On Thursday, the firm told staff it would increase fully-paid parental leave for primary caregivers in the US from 12 to 16 weeks.
Non-primary caregivers will get two weeks off, going forward, instead of one.
The changes will apply to eligible employees who have become parents since December.
"We wanted to be known as a company where health is really part of our overall culture," JPMorgan's head of human resources, John Donnelly, told Business Insider.
"It's something that Jamie Dimon talks about all the time," he added. "First and foremost, take care of your health. Not just physical health, but mental health and mental well-being. Take care of your family - however you define family. If you mess up either the first two, it'll probably be hard to have a great career anyway."
To get the must-read guide to the key issues at every major Wall Street bank, click here.
Donnelly said his team came up with the new policy after speaking with members of the firm's women's networking groups.
He said that last year, about 6,500 US employees went on parental leave. Of those, about 4,500 were primary caregivers.
"A lot of people in our demographic are having children, and this is something that just helps support them at these critical moments that take place in life," he said.
JPMorgan also increased bereavement leave for a death in the family to five days.
A number of banks have been changing their parental leave policies of late. Goldman Sachs provides 16 weeks of fully-paid maternity leave, according to its website, and last year increased its paid parental leave for non-primary parents to four weeks.
Morgan Stanley provides 16 weeks of paid parental leave to primary caregivers. Bank of America Merrill Lynch, meanwhile, provides 12 weeks of paid maternity, paternity, and adoption leave to employees who've been with the firm for more than a year. Citi offers 13 weeks of pregnancy leave and two weeks of parental leave for secondary caregivers.
The efforts are part of an attempt to help staff maintain a better work-life balance. JPMorgan on Thursday also announced new guidelines encouraging investment bankers to not come into the office on weekends.