The couple who wed in a lavish ceremony in Malibu earlier this month decided to start a family while on their honeymoon, with Josh particularly keen for them to become parents as soon as possible.
A source said: “They are seriously considering adopting.”
The pair initially clashed over Transformers star Josh’s desire to have a baby, with Fergie insistent she was not ready to get pregnant.
The source added to the National Enquirer magazine: “Fergie isn't ready to put her career on hold to have a child right now, but she knows starting a family is important to Josh and wants to make him happy.
"They decided that adopting is the perfect solution. They can start their family without Fergie having to put her on the back burner."
Fergie and Josh sparked reports they were planning a family shortly after their wedding, when the Black Eyed Peas singer allegedly told bystanders at Los Angeles International Airport she was already expecting a baby.
Asked if she was planning on having children in the near future, Fergie said: "I'm pregnant with twins."