Your baby’s body systems are beginning to form.
The rest of the world can not see that you are pregnant yet, and you may wish to keep the news for yourself at the moment. The fifth week of pregnancy marks the start of the embryonic period. This is when the baby’s body systems and structures begin to form. Your baby’s heart will divide into chambers and may actually start beating; although it is unlikely to show on any scans at this point. The placenta and umbilical cord are now providing nourishment and oxygen to your baby.

Your baby is now the size of a...
Sesame seed. The neural tube, which will ultimately form the spinal cord, brain, backbone and nervous system, is starting to develop. The heart and circulatory system have also begun forming.
Pregnancy symptoms at 5 weeks
Sore breasts, nausea, and fatigue are the most common symptoms during week 5.
Tips and advice for pregnancy at 5 weeks
Continue or start an exercise programme, you will need extra strength to cope with the rigours of pregnancy, and have your body in the best condition you can for the upcoming months, try swimming or walking in the fresh air. Also, since this is the time that your baby begins to develop, it is wise to cut our smoking and drinking completely.