Week 12
Trimester 1Days 11+0 to 11+6
Baby is now the size of a lime
Congratulations. You've reached Week 12 and are approaching the end of the first trimester. For many parents, this feels like a major milestone. Your baby has developed all major organs and body structures — from this point forward, the focus is largely on growth, maturation, and fine tuning. Many mothers also begin noticing that nausea and fatigue are slowly improving, although every pregnancy is different.
Length
5–6.5 cm
2.0 in–2.6 in
Weight
14–20 g
30.9 lb–44.1 lb
Development highlights
- check_circleAll major body systems — arms, legs, fingers, toes, eyes, ears, brain, heart, kidneys, liver, digestive organs — are now established.
- check_circleYour baby is becoming more coordinated, opening and closing hands, curling fingers, stretching, kicking, and turning their head.
- check_circleThe eyes have moved closer together and ears are approaching their final position.
- check_circleThe digestive system is beginning to practice movements for processing food after birth.
- check_circleTiny fingernails and toenails continue growing.
This week's milestones
- check_circleAll major organs and body systems in place.
- check_circleMovements becoming smoother and more coordinated.
- check_circleFace increasingly resembling a newborn.
- check_circleDigestive system beginning to practice.
Fun fact
Your baby may already be sucking their thumb, although they are still far too small for you to feel any of their movements.
Weekly checklist
- Continue prenatal vitamins.
- Stay hydrated.
- Eat balanced meals.
- Attend scheduled appointments.
- Discuss any screening options with your healthcare provider.
- Celebrate making it through the first trimester.
Frequently asked questions
Does the risk of miscarriage decrease after Week 12?
For many pregnancies, the risk decreases significantly after the first trimester, although every pregnancy is unique.
Is it normal if I still have nausea?
Yes. While many people improve around this time, some continue experiencing symptoms for several more weeks.
Can I feel the baby moving yet?
Most mothers cannot feel movement yet, although the baby is already very active inside.
Is it normal to feel more emotional than expected?
Absolutely. Pregnancy often brings a wide range of emotions that can surprise even people who expected to feel excited.
Related tools
shopping_bagHelpful picks for Trimester 1
Browse all pregnancy products →Frida Mom Anti-Nausea Acupressure Bands
Drug-free acupressure wristbands for morning sickness relief — wear during the first trimester to ease nausea without medication.
Lokaheadr 1st Pregnancy Essentials Kit
Curated first-pregnancy essentials gift set for new moms-to-be — everything you need for a comfortable first trimester.
Momcozy Maternity Pregnancy Pillow
Full-length maternity pillow with removable sections for bump support, back relief, and comfortable side sleeping.
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Medical information disclaimer
The content on this page is provided for general informational and educational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment.
Always consult your GP, midwife, health visitor, paediatrician, or other qualified healthcare provider before making decisions about your health or your child's health and development. Never ignore or delay seeking professional advice because of something you have read on BabyScout. If you think there is a medical emergency, call 999 (UK) or your local emergency services immediately.