The Duke and Duchess of Cambridge are expecting their second child just over a year after the birth of their first child, Prince George.
But despite what childless or mothers-of-one may believe, a second pregnancy is more than a 'been there, done that, bought the T-shirt' kind of affair.
We spoke to Elizabeth Duff, senior policy adviser at NCT, the UK's largest charity for parents, to find out exactly what Kate Middleton can expect now that she's expecting (again).
“The second time around you may feel like an expert in comparison to the first time," Elizabeth tells HuffPost UK Lifestyle. "You may find that you are more confident, knowing how you coped with the first baby."
While confidence is great, she is quick to point out that no two pregnancies are the same.
"Second pregnancies nearly always feel different from the first. Expectant mothers will probably get bigger more quickly, feel the baby move sooner and have more contractions in the third trimester," she tells HuffPost UK Lifestyle.
This means that expectant mothers have to be just as in tune with their bodies as during the first pregnancy to notice any unusual feelings or discomfort.
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Of course, this may be easier said than done when there is another child to care for.
“Second time around it can be harder physically as one might be juggling work and looking after an active toddler. So make time to eat properly and rest when you get the chance," she adds.
The NHS recommends consuming plenty of fruit, vegetables and protein, basing meals on starchy foods and consuming dairy products (low fat where possible). The advise against eating foods that are high in sugar or fat (or both).
Expectant mothers should also exercise regularly, which will help their bodies cope with pregnancy and prepare for labour.
For mothers who had difficulties carrying their first child, the idea of a second pregnancy can be daunting.
"If you had any difficulties first time, make sure that you talk with health professionals and friends and get the support and help you need," says Elizabeth.
"NCT refresher antenatal classes, if they are available in your area, are also useful."