:red_flag: Begins at implementing, 2 weeks after conception & continue until end of week 8
:red_flag: Week 3, a primitive heart& forerunner of kidneys develop along with 3 sacs that will become the digestive system
:red_flag: Week 4, the end of embryo neural tube swells to form a brain which is the spot that eyes appear on the embryo head, hearts begins to beat & the face start to take a shape and endocrine begins to develop
:red_flag: Week 6, produce pattern of electrical activities & it moves in response to stimuli
:red_flag: Week 7, embryo begins to move spontaneously
:red_flag:Week 8, live begins to function. connection between brain & others part of body also happen