Your baby will more than double in size this week, from about half a centimetre to a centimetre. The head and body are becoming more distinct, the head is quite big in relation to the body and the darkened specks of the forming eyes can be distinguished along with the facial openings for the mouth, nose and ears.
If you had an ultrasound at the start of this week it might looks something like the one on the right. Here the embryo is 4.7mm long and is safely nestled in the wall of the uterus. It's still too early to make out a baby shape, but this week you may well be able to see the heart already beating strongly.
The lungs, jaw and palate are now all beginning to form and the limb buds of the hands and feet have webbed structures that are the beginnings of the fingers and toes.
Around now the baby will make its first movements twitching its developing limbs in the fluid-filled sac. Obviously you won’t be able to feel your baby’s movements for quite some time to come, probably between weeks 16 and 20.
The tail-like prominence at the end of the spine is beginning to gradually disappear.
What’s happening with Mum?
Did we already mention nausea, indigestion and wind? There’s more of the same for a while yet unfortunately. If you’re one of the lucky ones who doesn’t feel nauseous, the effort of making a baby may make you feel constantly hungry: either way, you’re likely to be tempted to reach for sweet foods, so make an effort to substitute high calorie snacks for healthy options and try to establish a routine of a balanced diet that will provide you and your baby with the nutrients you need.
NB: All pregnancies are different and fetal growth rates vary, this is meant only as an approximate guide to development. If you have any concerns about your developing pregnancy then speak to your doctor.
Essential pregnancy dos and don'ts - Make sure you get your pregnancy off on a healthy track by following our essential pointers.
Safe to exercise?- If you're a keen sportswoman you're probably wondering whether it's safe to continue your exercise programme.
Crucial time to avoid alcohol - Weeks 6 - 12 are the most crucial weeks for your baby's development and the period when it's most important that you avoid alcohol here's why.
Useful pregnancy books - 
I saw the review of Yehuid Gordon's Birth and Beyond on this website, and it is a book I have and which has been pretty useful. It's also very dry and informative, rather than anecdotal. Any of you girls got any suggestions for books? 
Take a look at the book recommendations others gave Shelley on the forum.
You can join in the discussions and share pregnancy experiences and advice with other ThinkBaby members in the pregnancy folder.
Telling your partner - As soon as I saw the blue lines I was busting to share the news with everyone but Paul was a way on a business trip so I had to wait four whole days if I wanted to tell him face-to-face. Julia tells us in her online pregnancy blog.
Keeping a diary of your pregnancy is a great idea, on ThinkBaby you can keep an up-to-date online blog that you can email to your nearest or dearest or print out later for yourself, so why not start your own?
Pregnancy symptoms - Being pregnant affects everyone differently, but there are a number of very common symptoms that you may experience in the early weeks.
Pregnancy for dads - It takes two to become pregnant and it can help to have two actively involved in the pregnancy, here's what you need to be ready for as a dad.
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