How are Pregnancy Trimesters Divided and What Happens in
Each?
Each of the three trimesters of pregnancy lasts roughly 12 to 14 weeks. A full-term pregnancy
usually lasts around 40 weeks, calculated from the first day of the last menstrual period.
Understanding the changes that happen in each trimester can help you feel more prepared and
informed during your pregnancy journey.
First Trimester (Weeks 1–12)
The first trimester begins on the first day of your last menstrual period and lasts until the end of
week 12. The development of your child depends on this stage. During this time, all of the
baby's organs and body systems begin to form. You may not look pregnant yet, but your body is
undergoing significant changes. Hormone levels rise, which can lead to common symptoms
such as nausea, fatigue, breast tenderness and frequent urination.
To support your baby's growth, it is essential to eat a healthy diet rich in nutrients, especially
folic acid, which helps prevent neural tube defects. Avoid smoking, alcohol and certain foods like
deli meats and shellfish, as these can increase the risk of complications. During this trimester,
your first doctor’s appointment will typically occur between 6 to 8 weeks, where a pregnancy test
will confirm your pregnancy and early ultrasounds may check for a heartbeat.
Second Trimester (Weeks 13–28)
Pregnancy is generally thought to be most comfortable during the second trimester. Most early
pregnancy symptoms, like morning sickness, start to fade and you may feel a boost in energy.
Your belly will begin to show and you might want to invest in maternity clothes.
During this trimester, you may feel your baby's first movements, known as “quickening,” usually
around 16 to 20 weeks. This is an exciting milestone! Regular check-ups will include an
anomaly ultrasound between 18 and 22 weeks, where the doctor measures your baby's growth
and checks the organs. Additionally, screening for gestational diabetes typically occurs between
26 and 28 weeks.
Third Trimester (Weeks 29–40)
The last stage of your pregnancy is the third trimester. During this time, you will have more
frequent doctor visits to monitor your health and the baby's well-being. Symptoms may include
shortness of breath, swelling and sleep issues as your baby grows larger.
You will be monitoring the daily fetal kick count, minimum 10 movements should be perceived in
the period of 12 hours. It is important to stay close to your healthcare provider as you approach
your due date, especially if you are traveling.
In summary, each trimester of pregnancy brings unique changes and milestones for both the
mother and the baby. Staying informed and engaged with your healthcare provider can lead to a
healthier and more positive pregnancy experience