Pregnancy week by week?

Dr. Nandani Priya
06 August 2025

Pregnancy is usually about 40 weeks long and is divided into three trimesters. Here’s a quick week-by-week overview of what typically happens:

• Weeks 1–4: Fertilization occurs, and the embryo starts to implant in the uterus. You might miss your period.

• Weeks 5–8: The baby’s major organs begin to form. You may experience early symptoms like nausea and fatigue.

• Weeks 9–12: The baby grows rapidly, and facial features develop. Morning sickness might continue.

• Weeks 13–16: You might start to feel more energetic. The baby’s movements can sometimes be felt.

• Weeks 17–20: The baby’s gender can often be determined by ultrasound. You may notice a baby bump.

• Weeks 21–27: The baby grows bigger and stronger. You might feel regular movements.

• Weeks 28–40: Final growth and development happen. You’ll prepare for labor and delivery.

Each pregnancy is unique, so these stages can vary a bit.
For more detailed information and resources, you can visit the NICHD's official page on pregnancy

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Dr.Anjali Pathak
06 August 2025

Pregnancy by Week –

• Weeks 1–2: Not yet pregnant—body preparing for ovulation/conception starts about week 2 MedlinePlus.
• Weeks 3–5: Fertilization, implantation, early embryo formation; neural tube begins forming by week 5
• Weeks 6–10: Organs and limbs form; heartbeat detectable; facial features begin; movement may start nhs.uk.
• Weeks 11–13: First trimester wraps up; fetal features more defined; placenta takes over nourishment.
• Weeks 14–27: Growth accelerates; you may feel fetal movement (“quickening”); physical symptoms ease for many.
• Weeks 28–40: Rapid increase in weight and lung development; baby moves into head-down position; body readies for birth by week 40 .

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Aanya
06 August 2025

Pregnancy is measured in about 40 weeks, and a week-by-week guide helps you understand what to expect at each stage. Early weeks (0–12) form the baby’s organs and may bring fatigue, nausea, and mood shifts—commonly called morning sickness. In the second trimester (13–27 weeks), energy often returns, and you may feel baby’s first movements. The third trimester (28–40 weeks) is focused on growth, with more frequent checks and preparation for birth https://www.betterhealth.vic.gov.au/health/healthyliving/pregnancy-week-by-week. Pregnancy usually lasts between 37 and 42 weeks, and going late is normal. Tracking week-by-week supports timely care and emotional readiness.

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