Cryptic pregnancy: what is it and why does it happen?

Cravings for sugary foods are probably the most obvious – what with morning sickness, low moods and health problems, you're likely to be feeling a bit run down! Subseqeuntly, you'll be craving foods that'll give you a quick boost: simple carbohydrates like sweets, chocolate or white bread.Protein-rich foods (like eggs, dairy and meat) can help banish sweet cravings; they keep you fuller for longer, which can be great if you're battling long periods of nausea and can't stomach a lot of food. If you really need a sugar fix, though, go for fruit first – frozen berries can be great if you're craving ice cream, and exotic fruit like dried mango can be a good substitute for jelly sweets. If all you can think about is chocolate, go for the dark variety – it contains antioxidants that can boost the immune system, and there's less sugar.

Cravings for salt are quite obvious – usually, your body is crying out for some sodium. It can be a sign of stress – if you're stressed out, your body will be producing more adrenaline, and the adrenal glands need minerals to function properly. Salt cravings can also be an indication of low blood pressure, which can be common in the early stages of pregnancy.Plain rice with a tiny bit of soy sauce is a good option, as it's a complex carbohydrate that'll keep you fuller for longer. If you do go for crisps, try the lighter varieties that are lower in saturated fat and salt. As a rule, though, if you can see the grains of salt, there's too much on there!

Spicy food causes the body to release small amounts of endorphins (the same feel-good hormones you release when exercising), so maybe your hormones are making you feel a bit down.Spicy food isn't really bad for you – a vegetable curry, some chicken tikka or maybe a Mexican wrap with hot salsa aren't exactly weight-gain inducing. Just don't overdo it; your digestive system might not forgive you!

Sour cravings could be linked to your digestive health, as they cause your mouth to produce a lot of saliva, which kick-starts digestion.Lemons ranked third in a recent study of unusual cravings, so something with a sharp citrus flavour could be just the ticket. Before you reach for the Haribo SourMix, though, try lemon sorbet, which is made with fruit juice and has less than 100 calories per serving. Alternatively, a citrus-based fruit salad or a glass of fruit squash could work wonders for your cravings.

Sometimes, you just get the urge to eat anything and everything around you. This could be due to feeling down (thanks to yet more hormonal changes) or just feeling bored. Whatever your reasons, we can't vouch enough for knowing the difference between genuine hunger and emotional hunger.If you really need to consume something, try a hot or cold drink first. The temperature might distract your brain for a while, and ice has been a popular craving antidote among pregnant ladies for years – to the extent that, nowadays, ice lollies are the number 1 odd craving among mums-to-be!If there's literally nothing else that'll satisfy your craving, just go for it. Pregnancy is one time not to skimp on calories. In fact, you need an extra 300 calories a day to ensure a healthy baby.The only way you could be harmed by a craving is if you're only eating the food you crave – and therefore depriving your body of other nutrients.

After many months of rumours Cheryl announced her pregnancy 'subtly' in a group photo posted on Instagram.

In April 2016 Rob Kardashian and Blac Chyna announced they were expecting with a custom-made emoji.

Gaz Beadle and Emma McVey announced they were expecting earlier this year with a cute photo of the pair holding some tiny shoes.

In October 2015 John Legend and Chrissy Teigen took to Instagram to announce they were expecting simply saying, 'John and I are so happy to announce that we are pregnant :)' accompanied by a photo of John with his hand on Chrissy's belly.

Dark Angel actress Jessica Alba announced she was expecting for the third time with a photo of her and her two children holding giant balloons with the numbers 1, 2 and 3.

Justin Timberlake and Jessica Biel announced they were expecting on Justin's birthday. The photo showed Justin kissing Jessica's growing baby bump accompanied by a caption saying, '"Thank you EVERYONE for the Bday wishes! This year, I'm getting the GREATEST GIFT EVER. CAN'T WAIT. #BoyOrGirl #YouNeverKnow #WeDontEvenKnow #WeAreTakingBets' [sic]

In December 2012 Jessica Simpson took the opportunity to wish her followers a Merry Christmas as well as announcing she was expecting for the second time.

In June 2014 Kelly Rowland took to Instagram with a photo of two pairs of shoes and the caption, 'I'll be stuntin like my daddy.....'

Laura, Britain's most successful female Olympian, and her husband Jason (also an Olympian) announced they were expecting earlier this year with a photo of their bikes next to a kid's bike. The caption was just a heart emoji. ❤ufe0f

Russell Brand took the decision to reveal he and his wife, Laura Gallacher, were expecting with a photo of himself reading a book called 'The Expectant Dad's Handbook'.

Olympic swimmer Michael Phelps announced he was expecting with his fiancée Nicole Johnson with a photo of the couple holding some kid's swimming trunks, with Michael's initials on them.

In August 2017 former Strictly Come Dancing winner Ore Oduba announced his wife Portia was expecting this first child with this photo on Instagram and a very shocked face!

American singer and actor Kevin Jonas announced they were expecting their second child in 2016 with a photo of the couple in bed surrounded by snacks, while Kevin is reading a book on 'what to expect'.

American actress Nikki Reed and her husband Lost's Ian Somerhalder announced they were expecting with a photo of Nikki's big bump being kissed by Ian.