Stacy Keibler makes sure she works out every day.

The 34-year-old model, who is expecting her first child with husband Jared Pobre, admits she hasn't suffered with morning sickness or exhaustion throughout her pregnancy and believes it's because she's stuck to a regular fitness regime and eaten healthily.

Speaking to PEOPLE, she said: ''I haven't had one day where I've been sick or tired. I've had so much energy, but I'm very conscious of making sure I work out every day and eating healthy, so I really, truly believe that's a big part of it.

''I try to be as organic as possible, especially with food. I not only try to eat organic, but no preservatives, nothing artificial.''

Meanwhile, the blonde beauty, who is expecting a daughter, has been focusing her attention on her baby's arrival in August and is looking forward to dressing the tiny tot in adorable little girly clothes.

She explained: ''It's funny because I was actually with [designer] Rebecca Minkoff, who's having a girl too ... and we were talking about cute ... little girl things. I can't wait to get a little Rebecca Minkoff leather jacket! I'm so excited, especially [because] a lot of my friends that are designers [are] talking about things they've done for little girls' clothing and I just can't wait.''