You’re halfway through pregnancy! The fetus is about 6.5 inches long. An anatomy scan can check development.
Week 24 - Viability Threshold
Week 34 - Immune System Develops
Week 37 - Full-Term Begins
Week 25 - Brain Growth Spurt
Week 39 - Final Growth
Week 22 - Lung Maturation
Week 32 - Nail Growth
Week 19 - Muscle Development