Week 4 Four weeks from the start of your last period, a positive test shows you're pregnant.
Week 5 Measured from crown of head to rump, your baby is about 0.4 inch long—the size of a green pea.
Week 8 The baby is about 1 inch long—the size of a large olive. His features are already distinctly human.
Week 10 Your doctor will probably want to see you between eight and 10 weeks for your first appointment. That's when you'll get to view the heartbeat via ultrasound.