Rumours are rife that Jennifer Aniston is undergoing IVF treatment in order to get pregnant.

According to reports the former Friends star, who is engaged to actor Justin Theroux, has been displaying signs of in-vitro fertilization.

Jennifer with her soon-to-be husband Justin Theroux. 

An insider on the set of her new movie Squirrels to the Nuts, told In Touch magazine: “She definitely seemed to have gained some weight.”

The report claims that the actress “has begun IVF treatments, and if all goes as planned, she will be pregnant by her 45th birthday on February 1st.”

 

The actress at the premiere for her new film We're The Millers.

The source added: “She knows the clock is ticking – she’s well aware of it. She’s also done her homework. She’s explored all methods for having a baby and knows what her options are with IVF. There is no desperation. If it’s meant to be, it’s meant to be.”

Jen has been surrounded by pregnancy rumours since she got engaged to Justin last August. The couple were due to get married this summer but as yet no date has been set.