What does a human embryo look like at five weeks' gestation?
A human embryo at five to six weeks of development. (Reproduced by permission ofPhoto Researchers, Inc.)
More info: http://www.scienceclarified.com/El-Ex/Embryo-and-Embryonic-Development.html
At five weeks the baby to be is still an embryo, it will not become a fetus until the end of the first trimester. At five weeks the embryo is still masses of cells that are forming body parts. There are groups that will become the heart and circulatory system, the heart is beating and blood cells are beginning to flow. The nervous system (brain and spinal cord) are forming and CSF will soon be…
A doctor may be able to detect pregnancy at around five weeks, though a heart beat will not be detected yet. Just an embryo and the thickening of the uterine wall. Usually they set up an appointment at around 8 weeks. In the UK you may never see a doctor unless you have a problem. You will see a midwife from about 8 weeks as well.