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.
Pregnancy Basics
Week 28 - Rapid Weight Gain
Week 35 - Preparation for Birth
Week 9 - Fetal Movement Starts
Pre-Pregnancy Checklist
Implantation calculator
Pregnancy Food Guide
Week 1 - Early Pregnancy