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How Big is Your Baby This Week?

Get a sense of your baby's approximate length and weight from conception to birth with our week-by-week averages.
pepper corns Week 5

The ball of cells now resembles a tadpole and is as big as a peppercorn. The creation of the brain, spinal cord, heart, and blood vessels is already well under way.

Baby's Length: about 0.05 in.

Baby's Weight: less than 0.04 oz.