Halfway through the second trimester soon. The fetus is about 4.5 inches long. Ultrasound might show more details.
Week 8 - Major Organs Develop
Ovulation Prediction
Week 27 - End of Second Trimester
Week 13 - Rapid Growth Phase
Week 36 - Descent into Pelvis
Week 4 - Neural Tube Development
Week 14 - Bones Harden
Week 21 - Eyebrows Form