Your baby is now called a fetus, reflecting the formation of all essential organs and her change of shape from embryonic tadpole to a tiny human being about 2.5 centimetres long. Completing this change of shape the tail now disappears completely. The baby’s limbs are now well-formed, the arms have grown longer and the tiny fingers and toes have the ridges that will become nails.
If you had an ultrasound scan at nine weeks, so the beginning of your tenth week, it would probably look something like the one on the right. Here the 2.4cm fetus is curled over and facing downwards. To the right you can see the large head, then the body with one arm and towards the left are the leg limbs. The circle below the legs is the yolk sac on which this little one is caught mid-bounce.
Your baby’s eyelids are now beginning to fuse and, once shut, will stay that way until around the 26th week. The external part of the ears are now completely formed, as is the top lip and she now has a large forehead and very small nose.
The skeleton, formed from cartilage, is almost complete and between now and birth many of the bones will ossify, or harden.
What’s happening with Mum?
Your breasts may have swollen enough for you to need a larger bra. Choose one with good support to help you bear the extra heaviness more comfortably. You may even decide it's time to opt for a maternity bra, some women need them earlier than others. Sports bras can be a good, comfortable choice too. Many midwives recommend that you avoid underwired bras as your breasts grow during pregnancy as there is a concern that the wire could block the developing milk ducts and possibly lead to mastitis.
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.
Avoiding alcohol- Weeks 6 - 12 are critical to your baby's organ development and it's important to avoid alcohol during this time here's why.
Getting iron during pregnancy - A healthy intake of iron is vital to helping you create enough red blood cells your blood increases in volume during pregnancy, we tell you why and how to get it.
Involving your partner- It takes two to become pregnant and it can help to have two actively involved in the pregnancy, so make sure your partner has read up and is prepared for pregnancy.
Coping with morning sickness - It's one of the most common pregnancy complaints and can vary greatly in degree and duration of suffering. Here's what you need to know about coping with morning sickness.
Pregnant and fit? - 
Has anyone been to yoga or swimming when pregnant? If so when did you start and what can I expect? I have heard that yoga is good for your fitness when pregnant. I'm worried that by the time I have my baby I will have put on loads of weight, which I spent months before I got pregnant trying to get rid of (went from size 18 to 12)
asks Sophie on the forum.
There are loads of other useful threads so why not take a look a the pregnancy folder and join in the chat with other ThinkBaby members.
It's hard work this - I'm sooooo tired and at work in the afternoons I want to put my head down, just for a minute. By the time I get home I seem to have hardly anytime before I find myself drawn to my bed. Blogs Barb. You can keep your own online pregnancy blog on ThinkBaby here .
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