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size at two weeks the size of a pinhead. egg attaches to lining of the uterus. internal organs and circulatory system begins to form. the heart begins to beat. small bumps indicate the beginning of arms and legs.
Plan projects on a visual timeline
Map milestones, phases, deadlines, and key events in one place so the sequence is easier to see and share. Timetoast is a timeline maker for work, school, research, and stories.