The first trimester (weeks 1–12) is when your baby’s major organs begin developing. You may experience nausea, fatigue, and mood changes as your body adjusts. Regular prenatal check-ups, a balanced diet, and prenatal vitamins are key to a healthy pregnancy.
Learn about the changes your body goes through in the first trimester. Understanding them can help you feel more prepared for this exciting time.
Nausea and morning sickness: You may start feeling nauseous, especially in the morning, though it can occur anytime during the day. It often begins between weeks 4 and 9.
Fatigue: Extreme tiredness is common, as your body works hard to support the baby’s growth. Rest and hydration can help manage this.
Tender, swollen breasts: Hormonal changes may cause your breasts to swell and become sensitive. This is the body preparing for breastfeeding.
Food cravings or aversions: You may develop strong desires for certain foods or find some foods you previously enjoyed now make you nauseous.
Constipation: The hormone progesterone relaxes your digestive system, which can make it harder to have regular bowel movements.
Heartburns: The pregnancy hormones relax the valve between your stomach and oesophagus which can let stomach acid leak into your esophagus.
Implantation bleeding: In early pregnancy, you might get some harmless light bleeding, called "spotting". This is when the developing embryo plants itself in the wall of your womb.
Moodiness: The flood of hormones in your body in early pregnancy can make you unusually emotional and weepy. Mood swings are also common.
Bloating: Hormonal changes during early pregnancy can cause you to feel bloated, similar to how you might feel at the start of a menstrual period.
The first trimester is a period of incredible growth, from the earliest cell formations to the start of organ development. Discover key milestones in your baby’s progress.
Here's what your baby looks like in:
During the first trimester of pregnancy, your body undergoes significant changes to support your baby’s growth. Let’s look at some of these key changes.
Breast Changes: Your breasts may become swollen, tender, or feel heavier as they prepare for breastfeeding. You may also notice darkening of the areolas and more pronounced veins due to increased blood flow.
Weight Gain or Loss: While some women may gain a small amount of weight, others may lose weight due to morning sickness. Weight changes vary depending on your body’s response to early pregnancy. Try out our Weight Gain Calculator to estimate your weight fluctuation.
Increased Blood Volume: Your body increases blood production to support the baby, which can lead to feelings of dizziness or fatigue as your circulatory system adjusts. The increased amount of blood also causes the kidneys to process more fluids, leading to increased urination.
Uterine Growth: Even though your baby is still very small, your uterus begins expanding to accommodate its growth. You might experience mild cramping or stretching sensations in your lower abdomen as your ligaments and muscles adjust.
Skin Changes: Hormonal changes during pregnancy can affect your skin in various ways. You may notice changes in your skin, such as darkening of the skin around the face (melasma), or a healthy pregnancy glow due to increased blood flow and hormonal changes.
First trimester is a delicate stage, where taking the right precautions can make a big difference. Let’s look at some essential precautions to ensure a safe and healthy pregnancy.
Foods to Avoid
Activities to Avoid
Exercises to Avoid
Medicines to Avoid
First trimester can be overwhelming, but knowing what to do can help ensure a healthy pregnancy. Here's a quick guide on diet, exercise and sleeping positions:
First Trimester Pregnancy Diet
Exercises in the First Trimester
Sleeping Positions in the First Trimester
Medical Checkups and Scans in the First Trimester
Learn about the safety and changes surrounding sex during the first trimester. Find answers to common concerns and expert guidance for a comfortable and healthy experience.
Is it safe to have sex during the first trimester?
Sex during the first trimester is generally safe in a healthy pregnancy and does not carry any risks of miscarriage. However, do consult your doctor if you have complications like bleeding, pain, or a history of miscarriage for personalised advice.
What are some safe positions?
Most sex positions are safe in the first trimester as long as you’re comfortable. Try positions that don't put pressure on the abdomen, like lying on your side or spooning. Use pillows for support when needed. It's essential to listen to your body and communicate with your partner about comfort and any concerns.
The first trimester is considered a delicate phase. Eat a balanced diet, practice gentle prenatal yoga and meditation, and focus on maintaining your emotional and physical balance.
Take Prenatal Vitamins
Ensure you take prenatal vitamins throughout your pregnancy and the postpartum period
Early arrival
Discuss premature labour signs with the doctor to address concerns and get proper guidance.
Labor check-up
If your labour feels abnormal let the doctor examine you first for a correct diagnosis
Childbirth prep
Enrol yourself in prenatal courses to learn different labour stages and what to expect.
Stay active
A moderately intense 30-minute physical activity on most days of the week is great.
FAQ's
The first trimester of pregnancy typically starts from the first day of your last period up to 12 weeks.
Paracetamol (acetaminophen) is generally considered safe to use during the first trimester of pregnancy to relieve mild to moderate pain or fever. However, it's best to always consult your doctor before taking any medication during pregnancy.
During the first trimester, focus on nutrient-rich foods like leafy greens, lentils, dairy, fruits, and whole grains. These provide essential vitamins, minerals, and protein for both the mother's health and the baby's development.
You can sleep in any comfortable position in the first trimester. However, it would be helpful to practice sleeping on the side, particularly the left side, to prepare for the later phases of your pregnancy.
Generally, it is safe to travel during the first trimester if there are no complications. However, always consult your doctor for long-distance travelling or high-risk trips.
Try gentle stretching, staying hydrated, applying a warm compress to the affected area, and taking rest to relieve pregnancy cramps during the first trimester. Walking and prenatal yoga can also help. Always consult your doctor before taking any pain relief medications.
Sit with your back straight, shoulders relaxed, and both feet flat on the floor to maintain good posture during your first trimester. A cushion should help for lower back support. Avoid crossing your legs for better circulation.
Avoid raw or undercooked meat, fish high in mercury (like shark and swordfish), unpasteurised dairy, raw eggs, and unwashed fruits and vegetables to decrease the risk of infections and complications.