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Isla Fisher is finding her third pregnancy "tough".
The 'Confessions of a Shopaholic' actress - who has daughters Olive, seven, and Elula, four, with husband Sacha Baron Cohen - is struggling with carrying another child while looking after the needs of her older kids.
A source said: "Isla's exhausted. Sacha helps, but she's been finding this pregnancy her toughest yet because her daughters are so active."
Because the 38-year-old actress has found this pregnancy different to her previous two, she thinks she is going to be welcoming a son into the world in the coming months.
The source added to Closer magazine: "Luckily, she hasn't had morning sickness this time and feels that could be a sign she's having a boy."
Isla has previously admitted she prefers taking on supporting roles in movies these days, not only because they are "interesting" but also because they allow her to be around her family more.
The 'Great Gatsby' star said: "Family is 100 per cent my top priority. So I'm much more comfortable doing supporting roles right now.
"And often they're the most interesting. You get to be a character actress."
The Australian beauty breast-fed both her daughters until they were two years old and admitted she loved the "bond" it created between herself and her kids.
She has said: "What I loved about breast-feeding was that bond of one-on-one time. The serotonin that's released calms you down and connects you to the baby."
