Your baby is approximately 2 inches long, about the size of a lime, and weighs about a quarter of an ounce.

All the vital organs such as the kidneys, liver and lungs, are now in place and begin to grow and develop rapidly. Up to this point, an additional sac inside the amniotic fluid has been providing red blood cells, but now the baby’s liver is producing them for itself and the yolk disappears. Your baby's head makes up half the length of the body, and there is a bulge in the forehead allowing for brain development. Fingernails, toenails, and hair will begin to become visible this week. The fingers are no longer webbed. The baby is actively swallowing amniotic fluid and kicking his/her legs.

Your uterus has continued to grow, but you still are probably not showing at this time. Some of you may be ready to share with everyone that you are pregnant, while others may still be adjusting to the idea of being pregnant. It is important to be open about your feelings with both your partner and your health care provider.

At around 10 weeks, your midwife will offer to take a blood sample. This is sent off to a laboratory when it is tested for serum markers, which are proteins that may be present in your blood. If you have these particular proteins, it can be an early indication of whether your baby is at risk of Down’s syndrome. Your midwife might also recommend a test called chorionic villus sampling (CVS), if you’re at particularly high risk of having a baby with a serious inherited condition such as cystic fibrosis.

Week 10 is also when you’re likely to have the highest levels of the pregnancy hormone HCG in your blood, so sickness and other symptoms may be particularly severe. Despite the name, sickness in pregnancy doesn’t just happen in the mornings. You can help prevent or reduce sickness by eating small but frequent low-fat meals, and trying to get plenty of rest and fluids. It might help to keep a plain biscuit or cracker by your bed, to nibble before getting out of bed or if you wake feeling sick in the night. If you have very severe sickness, talk to your doctor or midwife about treatment.  

Even though you are pregnant, there are a wide variety of activities that you can participate in to stay in shape. Whether you were active before pregnancy or not, you need to consult with your health care provider on what kinds of activities are best suited for you. Many healthcare providers recommend walking and swimming because they are low impact exercises that can be used throughout the entire pregnancy.