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PREGNANCY WEEK BY WEEK

13 weeks pregnant

About the size of a lemon

7.4cm and about 23 g

This week

Fully formed. Now it is all about growing.

  • Everything is there
    Your baby is fully formed: organs, muscles, limbs and bones are all in place.
  • First sips
    Your baby swallows little sips of amniotic fluid, and the kidneys already make urine.
  • Curling fingers
    Reflexes are appearing: fingers curl, toes flex, small muscles respond.

Written against the NHS week-by-week guide. A picture, not a measurement: every baby grows at their own pace.

THIS WEEK’S QUESTION, FOR THE TWO OF YOU

“How did it feel to share the news more widely?”

Every Sunday, Syncry asks you both one question like this. You each answer in your own words, and the answers become your book.

Get next Sunday’s question

Your first month is free. No card needed to start.