Your Babies: Week 31

fetal development

Hotspot: 70,520

Twins are used to each other's movements -- and will be long after their birth!

Hotspot: 180,690

At this stage, your babies start gaining weight rapidly.

Hotspot: 465,75

Babies will need plenty of nutrients -- weight doubles between now and birth.

Hotspot: 108,165

Your babies each weigh as much as a buttercup squash: 3.5 lbs.

WebMD Medical Reference Reviewed by Traci C. Johnson, MD on June 25, 2018
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