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Ten Moons
Pregnancy home

Second trimester

Week 23

17 weeks to go

Eight short cards a week — the baby, your body, and you. You can read them in ten minutes and close the app.

Baby

What's growing

Hearing the outside world

About 28 cm crown-to-heel. Loud or rhythmic sounds may now elicit movement responses.

Source: Hepper & Shahidullah, Archives of Disease in Childhood 71(2), 1994 — Fetal hearing

Body

What's changing in you

Braxton-Hicks may begin

Practice contractions: irregular, painless tightenings. They are not labor — but call your provider if they become regular.

Source: Williams Obstetrics, 26th ed. (Cunningham et al., 2022)

General info — not personalized medical advice.

Bond

You & baby

Make a playlist

Repeated melodies in T3 are recognized by newborns up to four months later.

Source: Partanen et al., PNAS 110(37), 2013 — Prenatal experience and learning of melodies

Partner

For your partner

Sing the same song

If your partner sings or plays one tune nightly, baby will track that voice after birth too.

Source: Partanen et al., PNAS 110(37), 2013 — Prenatal experience and learning of melodies

Reflection

60-second prompt

What sound do you want to hear at birth?

A song, a voice, silence. Decide before the day.

Source: Lieberman et al., Psychological Science 18(5), 2007 — Affect labeling

Developed and curated by perinatal psychologists, family & couples counsellors, doulas, perinatal health & fitness specialists, and IBCLCs / lactation consultants. Educational — not a substitute for medical care.