Pregnancy Symptoms by Week | Your Pregnancy Week-by-Week Guide

Pregnancy symptoms change throughout each stage of pregnancy. Discover common pregnancy symptoms week by week, what happens in each trimester, and follow your pregnancy journey with our Pregnancy Week Tracker.

Pregnancy is an exciting journey filled with physical and hormonal changes. Many pregnant women want to understand what happens week by week during pregnancy and what symptoms to expect as their baby grows.

While every pregnancy is different, a pregnancy week-by-week guide can help parents understand the common changes that occur during the first, second, and third trimesters.

Tracking pregnancy symptoms by week can also help you feel more prepared and reassured as your pregnancy progresses toward your due date.

Using tools like the Pregnancy Week Tracker on Parenting Hub can help parents follow their baby’s development and understand what is happening at each stage of pregnancy.

Understanding Pregnancy Week by Week

Pregnancy typically lasts around 40 weeks, beginning from the first day of your last menstrual period. During these weeks of pregnancy, your baby grows from a tiny group of cells into a fully developed newborn.

Each trimester brings different symptoms and milestones.

Pregnancy is generally divided into three stages:

First trimester (weeks 1 – 12)
Second trimester (weeks 13 – 27)
Third trimester (weeks 28 – 40)

Your health care provider or midwife will monitor your pregnancy throughout these stages using ultrasounds, health checks, and prenatal appointments.

First Trimester Symptoms (Weeks 1–12)

During the first trimester, your body begins adjusting to pregnancy hormones and supporting the early development of the baby and uterus.

Common early pregnancy symptoms include:

Fatigue
Nausea and morning sickness
Breast tenderness
Frequent urination
Mood changes
Mild cramping

Many women confirm pregnancy during this stage with a pregnancy test.

Around week 6, your baby’s heartbeat may be detected during an ultrasound.

By week 12, the baby’s major organs have started forming, and the risk of miscarriage decreases significantly.

Second Trimester Symptoms (Weeks 13–27)

The second trimester of pregnancy is often called the most comfortable stage for many pregnant women.

Morning sickness usually improves, and energy levels may return.

Common symptoms during this stage include:

A growing belly as the uterus expands
Improved appetite
Back pain
Skin changes
Feeling the baby move for the first time

Many parents feel their baby’s first movements between week 17 and week 22.

During this stage, an ultrasound may reveal the baby’s development and help confirm the expected due date.

Weight gain during pregnancy also becomes more noticeable in the second trimester as your baby continues to grow.

Third Trimester Symptoms (Weeks 28–40)

The third trimester is the final stage of pregnancy as your baby prepares for birth.

Symptoms may include:

increased fatigue
swelling in the hands and feet
heartburn
shortness of breath
frequent urination
difficulty sleeping

Many pregnant women also experience Braxton Hicks contractions, which are practice contractions that prepare the body for labour.

By week 37, pregnancy is considered full term, and the baby continues to develop until birth around week 39 or week 40.

Key Pregnancy Milestones by Week - Pregnancy Symptoms by Week

Although every pregnancy progresses differently, some important milestones include:

Week 5
Pregnancy hormones increase, and early symptoms may appear.

Week 12 (12 Weeks)
End of the first trimester, and many parents share pregnancy news.

Week 20
At the halfway point of pregnancy, baby movements become more noticeable.

Week 24
Baby’s hearing develops, and movement becomes stronger.

Week 37
The baby is considered full term and is preparing for birth.

Track Your Pregnancy Week by Week

Understanding pregnancy symptoms week by week can help you feel more confident throughout your pregnancy journey.

The Pregnancy Week Tracker on Parenting Hub lets parents track their pregnancy progress and learn what to expect each week.

You can also use the Due Date Calculator to estimate your baby's arrival based on the first day of your last menstrual period.

Parenting Hub provides a range of free pregnancy tools designed to support parents from early pregnancy through birth.

Explore more helpful resources in Parenting Hub Free Tools.

When to Speak to Your Midwife or Health Care Provider

While most pregnancy symptoms are normal, it is important to contact your health care provider or midwife if you experience:

Severe abdominal pain
Heavy bleeding
Severe headaches or vision changes
Sudden swelling
Reduced baby movements later in pregnancy

Regular prenatal check-ups help ensure both mother and baby remain healthy throughout pregnancy.

Final Thoughts – Pregnancy Symptoms by Week

Pregnancy is a remarkable journey that unfolds week by week as your baby grows and your body adapts.

Understanding pregnancy symptoms by week helps parents feel informed and reassured during each stage of pregnancy.

From early pregnancy symptoms to the final weeks before birth, tracking your pregnancy can help you prepare for the arrival of your baby.

Using tools such as the Pregnancy Week Tracker and Due Date Calculator on Parenting Hub can help you track your pregnancy milestones and stay informed throughout your pregnancy.

You can also explore the Parenting Genie website for more tips and insights.

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