Your Baby: Week 6

fetal development

Hotspot: 275,185

The neural tube forms; it develops into the brain, spinal cord, and backbone.

Hotspot: 360,370

Your baby's heart and lungs start to develop.

Hotspot: 260,380

Your baby's heart starts to beat.

Hotspot: 235,550

Your baby is big enough to measure: 0.16 in. A due date can be determined!

WebMD Medical Reference Reviewed by Traci C. Johnson, MD on June 25, 2018
© 2018 WebMD, LLC. All rights reserved.