Now the embryo is growing rapidly by about a millimetre a day. The shape of the head and upper body is forming,
the brain is developing, and the digestive tract is emerging. By the end of the seventh week, the lungs, liver,
kidney and internal sex organs are formed. Legs, arms and almost paddle-like hands can already be seen in the
ultrasound. The face with nose and eye sockets is also formed. The first muscle strands develop and the embryo
begins to move.