🌱 First Trimester Guide (Weeks 1-12)
PH
PureHealthness Editorial Team · Health writers & reviewers
📝 Last reviewed: August 2026
✔ Transparent sourcing · Some articles are AI-drafted, then reviewed & fact-checked by our team
📝 Last reviewed: August 2026
What happens: the embryo becomes a fetus; your hormones (hCG, progesterone) surge — causing fatigue, nausea and tender breasts.
Nausea tips: small frequent meals, ginger, crackers before getting out of bed, avoid strong smells.
Safe exercise: walking, swimming, stationary cycling, prenatal yoga — keep it "talk test" easy.
Avoid: alcohol, smoking, raw seafood, unpasteurised dairy, hot tubs/saunas, and any new supplement without your doctor.
Emergency signals — contact your provider immediately: heavy bleeding, severe headache with vision changes, sudden severe swelling, fever, fluid leakage, decreased fetal movement, or contractions before 37 weeks.
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