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PREGNANCY WEEK BY WEEK

21 weeks pregnant

About the size of a pomegranate

26.7cm and about 360 g

This week

Halfway there, and settling into rhythms.

  • The halfway mark
    Week 20 marks the halfway point of a full-term pregnancy.
  • Sleep and wake cycles
    Your baby now has clear patterns of sleeping and waking, not always matching yours.
  • Soft down all over
    A fine soft hair called lanugo covers the body, helping hold the protective vernix in place.

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

“What kind of space, or world, do you want to make for the baby?”

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.