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Pregnancy Week-by-Week Guide

Follow your baby's development and learn what to expect each week of your pregnancy journey

First Trimester (Weeks 1–12)

1
Week
Development

Pregnancy Week 1 — Preparing Your Body for Conception

Understanding your menstrual cycle, improving fertility, and setting a healthy foundation for pregnancy.

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2
Week
Development

Pregnancy Week 2 — Ovulation & Conception Possibilities

Ovulation occurs, increasing the chance of fertilization; prepare your body and mind.

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3
Week
Development

Pregnancy Week 3 — Fertilization & Early Cell Division

The sperm meets the egg, forming a zygote; early cellular development begins.

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4
Week
Development

Pregnancy Week 4 — Implantation & First Signs of Pregnancy

The embryo implants in the uterus; pregnancy tests may start showing positive results.

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5
Week
Development

Pregnancy Week 5 — Baby's Heartbeat Begins & Hormonal Changes

Baby's heart starts to beat; mom experiences early pregnancy symptoms such as fatigue and nausea.

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6
Week
Development

Pregnancy Week 6 — Early Development & Symptoms Peak

Rapid embryonic development occurs; nausea, breast tenderness, and mood swings may intensify.

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7
Week
Development

Pregnancy Week 7 — Facial Features & Brain Formation

Baby's face starts forming, neural tube development progresses; mom may experience heightened emotions.

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8
Week
Development

Pregnancy Week 8 — Baby's Fingers, Toes & First Heartbeat

Limbs are more defined, organs developing; mom may feel more noticeable morning sickness.

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9
Week
Development

Pregnancy Week 9 — Tiny Movements & Internal Development

Baby starts tiny movements inside the womb; vital organs continue forming.

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10
Week
Development

Pregnancy Week 10 — Fetus Stage Begins

The embryo officially becomes a fetus; growth continues rapidly.

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11
Week
Development

Pregnancy Week 11 — Developing Movements & Reflexes

Baby begins stretching, reflexes form; mom may notice relief from some early symptoms.

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12
Week
Development

Pregnancy Week 12 — Welcome to the Second Trimester

Critical development is complete; risk of miscarriage decreases and energy may return to mom.

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Second Trimester (Weeks 13–27)

13
Week
Development

Pregnancy Week 13 — Energy Returns & Morning Sickness Eases

Mom may feel more energetic; baby grows rapidly and facial features become distinct.

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14
Week
Development

Pregnancy Week 14 — Baby's Movements May Be Felt Soon

Quickening may begin; baby continues forming essential organs and bones.

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15
Week
Development

Pregnancy Week 15 — Baby Hears Sounds & Responds

Auditory senses develop; mom may start to feel subtle movements.

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16
Week
Development

Pregnancy Week 16 — Quickening: Feeling Baby's First Kicks

Baby's movements become noticeable; mom's belly begins to round out.

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17
Week
Development

Pregnancy Week 17 — Stronger Bones & Skeleton Hardens

Baby's skeletal system strengthens; mom may experience backaches or growing belly discomfort.

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18
Week
Development

Pregnancy Week 18 — Anatomy Scan & Baby's Growth Check

Detailed ultrasound reveals baby's growth, position, and gender (if opted).

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19
Week
Development

Pregnancy Week 19 — Developing Senses & Skin Formation

Baby develops taste buds, skin becomes less transparent; mom may notice more distinct movements.

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20
Week
Development

Pregnancy Week 20 — Halfway Mark & Gender Reveal

Midway through pregnancy; many parents schedule anomaly scans.

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21
Week
Development

Pregnancy Week 21 — Baby Responds to External Sounds

Mom may feel baby moving more actively in response to sounds or touch.

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22
Week
Development

Pregnancy Week 22 — Baby's Rapid Growth Continues

Facial features more defined; mom may notice increased appetite or fatigue.

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23
Week
Development

Pregnancy Week 23 — Baby's Lungs Developing

Lungs continue maturing; baby movements more coordinated.

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24
Week
Development

Pregnancy Week 24 — Viability Milestone

If born prematurely, baby has a chance of survival with medical care.

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25
Week
Development

Pregnancy Week 25 — Strong Kicks & More Movements

Baby is more active; mom may feel rolling movements.

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26
Week
Development

Pregnancy Week 26 — Baby Opens Eyes & Responds

Eye development progresses; mom may notice rhythmic movement patterns.

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27
Week
Development

Pregnancy Week 27 — Preparing for Third Trimester

Baby continues rapid growth; mom may experience back discomfort and heartburn.

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Third Trimester (Weeks 28–40)

28
Week
Development

Pregnancy Week 28 — Final Stretch Begins

Entering the third trimester; mom may feel fatigue and more frequent baby movements.

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29
Week
Development

Pregnancy Week 29 — Stronger Kicks & More Growth

Baby becomes more powerful in movements; mom may experience shortness of breath.

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30
Week
Development

Pregnancy Week 30 — Rapid Brain Development

Baby's brain grows quickly; mom may notice Braxton Hicks contractions.

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31
Week
Development

Pregnancy Week 31 — Practice Breathing & Muscle Tone

Baby practices breathing and stretches; mom may experience pelvic pressure.

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32
Week
Development

Pregnancy Week 32 — Gaining Fat & Energy Storage

Baby stores fat for temperature regulation after birth.

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33
Week
Development

Pregnancy Week 33 — Getting Ready for Birth

Baby positions head-down; mom may notice more discomfort.

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34
Week
Development

Pregnancy Week 34 — Nervous System Matures

Baby's nervous system is nearly complete; mom may experience fatigue and swelling.

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35
Week
Development

Pregnancy Week 35 — Almost Full-Term

Baby organs nearly fully developed; mom prepares mentally for labor.

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36
Week
Development

Pregnancy Week 36 — Full-Term Approaches

Baby drops lower into pelvis; mom may feel stronger pelvic pressure.

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37
Week
Development

Pregnancy Week 37 — Early Full-Term

Labor could start any time; baby continues to gain weight and practice movements.

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38
Week
Development

Pregnancy Week 38 — Final Preparations for Birth

Baby's lungs are ready; mom may experience more frequent contractions.

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39
Week
Development

Pregnancy Week 39 — Baby is Ready for Birth

Your due date is close; baby is positioned for birth.

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40
Week
Development

Pregnancy Week 40 — Full-Term & Labor Readiness

The baby is fully developed; labor can start at any time.

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