The embryo forms three germ layers (ectoderm, mesoderm, endoderm) that will develop into organs. Light spotting might occur due to implantation. Take folic acid to support growth.
Week 31 - Bone Strengthening
Week 6 - Limb Buds Appear
Week 20 - Halfway Point
Exercise for Period Pain
Week 14 - Bones Harden
Week 28 - Rapid Weight Gain
Week 39 - Final Growth
Week 40 - Ready for Birth