What's growing
Brain folds rapidly; REM appears
Cortical gyrification accelerates. Distinct REM sleep is observed — baby dreams in some sense now.
Source: Mirmiran, Maas & Ariagno, Sleep Medicine Reviews 7(4), 2003 — Fetal & neonatal sleep
What's changing in you
Third trimester begins
The glucose tolerance test usually happens around now. Heartburn and shortness of breath are common.
Source: ACOG Practice Bulletin 190 — Gestational Diabetes Mellitus (2018)
General info — not personalized medical advice.
Maternal brain
Fear of birth often surfaces
Naming the fear out loud reduces its grip. Up to 1 in 5 birthing people experience clinically significant birth-related anxiety.
Source: Nilsson et al., Women and Birth 31(1), 2018 — Fear of childbirth review
You & baby
Routine touch and talk
Babies recognize patterns repeated in T3 — voices, music, rhythms — and prefer them after birth.
Source: Partanen et al., PNAS 110(37), 2013 — Prenatal experience and learning of melodies
For your partner
Have the birth-prep conversation
Preferences, fears, what 'support' actually means to you. Specifics reduce conflict on the day.
Source: Gottman & Gottman, Bringing Baby Home — J Family Communication 5(4), 2005
Move with care
Side-lying breath
Diaphragm + pelvic-floor coordination — five slow breaths per side before sleep. Trained lifters can continue resistance work into T3; Davenport 2025 found brief Valsalva and near-RM compound lifts acutely tolerated in trained participants. For people new to lifting, T3 is not the trimester to start heavy.
General info — not personalized medical advice.
Eat for two brains
Anti-inflammatory bias
Olive oil, berries, fatty fish, nuts. A Mediterranean pattern is associated with lower risk of GDM and preeclampsia.
Source: Biagi et al., Nutrients 11(5), 2019 — Mediterranean diet in pregnancy
General info — not personalized medical advice.
60-second prompt
What would help you feel safer?
Name one specific thing. Then ask for it.
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.