Your Babies: Week 6

fetal development

Hotspot: 275,185

The neural tubes form, developing into brains, spinal cords, and backbones.

Hotspot: 360,370

Your babies' hearts and lungs start to develop.

Hotspot: 260,380

Your twins' hearts start beating.

Hotspot: 235,550

Your babies are 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
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