Your baby has already completed its most important stage of development. By this point the basic foundations of all his vital components are now in place and simply require growing and developing further. His skeleton now consists only of cartilage and only during the first years of life outside the womb will this be replaced by natural bone.
The head of the baby is still very large compared to the body, about half the total size of the fetus. In this week the irises of your baby's eyes will grow as will hit tiny nails. His eyes are now closed and will only open again around week 26.
Your pregnancy should still not be visible although you will be able to feel your growing uterus. If you lie flat on your back and gently feel above your pubic bone with your fingertips you should feel a hard edge. This small ball-like structure is the top of your womb although it will be a while before you will begin to develop a clear pregnancy belly.
Many women are concerned with their weight and during pregnancy this is even more so. Some women find that they lose weight within the first few months because they are working or they suffer from pregnancy symptoms such as morning sickness. Others find they gain weight quickly and each woman is different so try not to worry too much at this stage. The average weight gain during pregnancy is somewhere between 12 and 20lbs and this can be gained at the beginning, the middle, or at the end of the pregnancy. Some women weigh less at the end of their pregnancy than they did before although this is very rare. The important thing is that you do not suddenly start to diet as it is vital that your baby gets all the necessary vitamins and minerals to help him grow properly.
You may notice that your skin changes from day to day throughout your pregnancy and it is important that you take more care of it now. You should lubricate your skin regularly with a moisturizer or a special pregnancy cream or oil. Try to avoid too much sunbathing as although UV radiation is not harmful to your baby, it is not good for your skin and your health. It can be that you will develop what is known as a `pregnancy mask` consisting of irregular pigmentation in the skin. This can cause changes to the coloring of your skin and in severe cases can still be present years after giving birth but again you shouldn't worry too much as this is very unusual.