Now that we have an official due date for Kate and Wills' baby - mid-July - we'll be highlighting what's going on in the life of the pregnant duchess and the HRH-to-be. Check here daily for updates from now until the birth.

Week 14

In Good Health

With special reporting by Dr. Jennifer Ashton:

As if she doesn't have enough to worry about, Kate Middleton is dealing with an issue other pregnant women are facing as well: the threat of influenza.

Because of the mother's suppressed immune system, and also factors associated with the growing uterus, the flu can be very serious and deadly for a pregnant woman. I've seen firsthand how sick a pregnant woman can become with flu and I take this virus very seriously. I once cared for a pregnant 18-year-old who died of influenza during pregnancy.

The Centers for Disease Control and Prevention and the American Congress of Obstetricians and Gynecologists recommend that all pregnant women get vaccinated against the flu, not just for their own protection, but for their future newborns. In addition, pregnant women should minimize contact with sick individuals, and wash their hands very often. Also, whether you are making a royal appearance or work in an office, keeping a hand sanitizer in your purse is a great idea.

Staying Fit and Fab

Even super-slim Kate Middleton will have to give it up soon enough: those flat abs will be gone. It's time to get up off the floor and do all her core work in a sitting, kneeling or standing position to avoid the risk of cutting off the baby's oxygen supply. That's official advice from the American Congress of Obstetricians and Gynecologists' pregnancy and exercise guidelines.

Fitness pro Ellen Barrett, star of the "Happy Baby, Fit Mama" DVD workouts, recommended this killer core move to keep everything underneath the baby bump toned and strong.

Slow motion knee lift

Start standing with feet planted hip width apart in parallel. Shift your weight into the left leg, and lift your right knee toward your chest as you exhale. On the inhale, return the leg to the ground. The torso remains vertical the entire time (no rounding). Repeat the action with the right knee nine more times for a total of 10 reps, then switch sides shifting the weight into the right leg as you lift the left knee on an exhale for 10 more reps. Remember to keep the moves controlled with no momentum.

Eating for Two

Kate Middleton continues to improve following her stay in hospital last month for severe pregnancy-related sickness, a spokesman for the couple said earlier this week. At this point, even someone who's experienced as much morning sickness as Kate has should be past the worst of it and enjoying a welcome burst of second-trimester energy.

Good nutrition should now be the Duchess' focus.

"Folic acid, protein, iron, calcium vitamin D and vitamin A are really important for both mom and baby," said Katherine Farrell Harris, a New York-based registered dietitian who is also in her second trimester with her first child. "A mom-to-be's diet should be loaded with foods like colorful veggies, dark leafy greens, fortified cereal and low-mercury fish."

If Harris had to recommend one super food to Middleton, it would be lentils which are a good source of protein and loaded with fiber, B vitamins, potassium, magnesium and other healthy nutrients.

What's Up with Mum?

The entire planet has been aware that Kate Middleton, the Duchess of Cambridge, has a crumpet in the oven for some time, but if you're about the same way along in your pregnancy, you've probably kept it on the down low until now.

According to Dr. Marjorie Greenfield, a board-certified obstetrician-gynecologist in Cleveland and author of " The Working Woman's Pregnancy Book," by week 14 the risk of miscarriage is largely behind you and your belly has probably grown so you look obviously pregnant.

"This is a good time to let the cat out of the bag," Greenfield said.

When you share your wonderful news with people at work, Greenfield advised treading carefully.

"You want to tell your friends, of course, but make sure your boss isn't the last to know," she said. The best plan of action: Make an appointment with your boss, tell your best office mates in person, then email everyone else.

What's Up With the Fetus?

At 14 weeks, Kate's fetus is about the size of a package of Jammie Dodgers biscuits. Photo credit: Paul Hurst.

From the top of its crown to its royal rump, Kate's babe-to-be is now nearly 9 centimeters long and weighs 25 grams, about as much as a Jammie Dodgers British biscuit. Or, if this were your baby, we'd describe it as about 4 inches long and weighing an ounce, about as much as two Keebler Rich 'n Chips cookies.

Developmentally, things are starting to fall into place: the ears have migrated from the back of the neck to their final location on the side of the head, and the peepers have gradually moved from the sides to the front of the face. The heart, intestines, arms and legs have all reached their final destinations as well.

Oh, and it's also possible that external genitalia can now be seen on sonogram. Let's hope this means Kate's loose-lipped friend, Jessica Hay, will spill the beans very soon about whether the duchess, 31, is expecting a prince or a princess.