In Month 3, your baby is
the size of a Lime
Your baby is growing rapidly, and key organs are developing. Explore early pregnancy changes in your body and tips for a healthy start to the second trimester.
Welcome to the third month of your pregnancy! You are about to finish your first trimester, and this is when things start to feel a bit more real. Your body is starting to adjust and adapt – an exciting time with so many changes, both for you and your little one.
Your baby is rapidly growing, with major milestones like facial features, genitals, and coordinated movements taking shape this month.
Your baby’s head is more rounded now, and their body is starting to lengthen. The external genitalia is forming, and though it’s still too early to tell the sex, it’s starting to show early signs of development. Their face is looking more human, with lips forming and the eyes developing pigment.
Your baby is moving more freely in the womb, and the first signs of teeth buds are starting to appear. Their skin is becoming thicker, and tiny nails begin to form on their fingers and toes. The intestines are moving into place, and the baby’s bones and cartilage are beginning to develop. Their arms, complete with elbows, can already bend - how amazing is that?
Your baby's features are becoming more defined. By now, the kidneys are fully functional, and the baby has started producing urine. The small bumps on the legs are turning into knees and ankles. The baby’s movements are becoming more coordinated as they grow stronger.
By the end of this week, your baby’s genitals are fully formed, and they may start moving their hands to their face. They’ll also be developing fine hair (lanugo) that will cover their body. Their face looks more human, and they’re continuing to grow rapidly as their digestive and other systems develop further.
Your baby is growing at an incredible rate, and this month marks the end of the first trimester! Let’s break down all the exciting changes.
Organ Development
At this stage, your baby’s organs are developing rapidly. In the third month of your pregnancy, your baby’s genitals are growing, and the swallowing and sucking reflexes start to work. The liver starts functioning, producing bile, while the kidneys also begin to work. The intestines, which were once outside the body, are now moving into place inside the abdomen. The heart is fully formed with all four chambers working, and the circulatory system functions smoothly. Your baby’s heart rate is around 120–160 beats per minute.
Physical Features
Your baby’s face is becoming more recognisable, with a distinct chin, nose, and mouth. Their eyes are fully formed. Sensory development is also progressing - your little one can hear muffled sounds from outside the womb, and their eyes are beginning to move. The hands and feet now have defined fingers and toes, and they may even be able to curl their fingers. The baby’s skin is still translucent, but it’s starting to develop a more defined texture. They are also growing a bit of peach-fuzz-like hair!
Weight of the Foetus
By the end of the third month, your baby is around 5-6 cm long, about the size of a lime, and weighs about 14 grams.
Baby Movement
Your baby is moving at this point, but you won’t be able to feel those movements yet. Their muscles and nerves connect, allowing for tiny kicks and twitches, but it’ll still be a few more weeks before you feel anything.
At 3 months, you're nurturing a miracle. Trust your body, stay positive, and know you're already giving your baby the best start.
As your baby grows, your body changes to support your little one. Here are some changes you might notice:
Morning Sickness
Nausea may begin to fade for some, though it might persist for others during this stage.
Breast Changes
Your breasts may still be sore, but tenderness could start to decrease.
Energy Levels
You might feel more energetic as the second-trimester approaches, though occasional fatigue is still common.
Waistline Expansion
As your uterus grows, your waistline may expand, and a baby bump might appear.
Bloating and Indigestion
You may still experience bloating or mild indigestion as hormonal changes continue.
Your diet continues to play a key role in your baby’s development. Nutrient-rich foods will help your baby grow strong and healthy.
Foods to Eat:
Foods to Avoid:
Regular exercise is still important to keep your body strong and help with pregnancy symptoms. Just be sure to take it easy and listen to your body.
Safe Exercises to Do:
Exercises to Avoid:
Childbirth prep
Enrol yourself in prenatal courses to learn different labour stages and what to expect.
Food to avoid
It's best to not consume raw, high-mercury fish, unpasteurised dairy and alcohol
Embrace change
Breast changes like heaviness and larger areolas are normal, switch to supportive bras.
Stay active
Moderately intense exercise is great for you, but avoid sports that risk abdominal injury.
Prenatal diet
Make your diet nutritious and include prenatal vitamins containing folic acid and iodine.
This is an exciting time as your baby’s development becomes more noticeable. Your doctor may recommend the following tests:
Ultrasound
A dating ultrasound may be done to confirm your due date and check your baby’s development. This is typically done between 8 and 12 weeks.
Blood Tests
A blood test may be done to screen for genetic conditions, such as Down syndrome.
Nuchal Translucency Screening (NT Scan)
In the third month of pregnancy, your doctor may recommend a nuchal translucency (NT) scan, also called an NT-NB scan, to check for chromosomal conditions and preeclampsia. This scan is typically done between 11 and 13 weeks, plus 6 days of pregnancy. It screens for chromosomal conditions like Down's syndrome, Edwards' syndrome, and Patau's syndrome. An ultrasound is used to measure the thickness of the fluid at the back of your baby’s neck (nuchal translucency).
Mental Health
In month 3 of pregnancy, hormonal changes may continue to affect your mood, leading to fatigue, anxiety, and occasional stress. It’s important to be kind to yourself during this time. Connect with trusted friends or family members to talk about your feelings.
Staying active with gentle exercises, eating nourishing foods and vitamins, and prioritising good sleep can help boost your mood. Opt for prenatal classes or engage in hobbies. Remember to rest when needed and consult your doctor for guidance and care if you feel anxious or bogged down.
Fatigue is a common symptom during pregnancy, especially in the first trimester. This is due to the increased blood volume and hormonal changes your body is experiencing to support your growing baby.
Yes, mood swings are common during pregnancy due to hormonal fluctuations. You may find yourself feeling more emotional or irritable than usual. Practice self-care, communicate with your partner and loved ones, and don't hesitate to seek support if needed.
It's natural to have some anxiety during pregnancy, but it's important to find healthy ways to manage it. Engage in relaxation techniques like deep breathing, meditation, or prenatal yoga. Talk to your healthcare provider about your concerns and surround yourself with a supportive network of family and friends.
Avoid high-impact activities, contact sports, and exercises that involve lying flat on your back after the first trimester. It's also important to steer clear of activities that pose a risk of falling or injury. Always consult with your healthcare provider before starting any new exercise routine.
Yes, heartburn is common during the third month of pregnancy. Hormonal changes can relax the muscles that control your stomach, leading to acid reflux. Eating smaller meals, avoiding spicy or greasy foods, and staying upright after eating can help manage heartburn.