Expecting moms love the second month of pregnancy, as it is one of the most exciting phases. Weeks 5 to 8 of pregnancy Your baby is growing fast during weeks 5 to 8, with major organs starting to develop and pregnancy symptoms often intensifying.
At this stage, many women confirm their pregnancy formally with a home pregnancy test or an ultrasound. Your baby is still tiny, about the size of a sesame seed, but amazing development is happening inside the womb every single day during the early weeks.
In this article we will review all that you need to know about pregnancy weeks 5 to 8 including baby size, symptoms, foetal development, body changes and important care tips for a healthy pregnancy.
Pregnancy Weeks 5–8 Explained
Weeks 5 through 8 are in the first trimester. This time is very important because this is when your baby’s brain, heart, spinal cord and little structures in the body start to form.
Short Summary
| Week of Pregnancy | Baby Size | Major Development |
|---|---|---|
| Week 5 | Sesame seed | Heart and neural tube begin to form |
| Week 6 | Lentil | Heartbeat audible |
| Week 7 | Blueberry | Development of brain and facial features |
| Week 8 | Kidney bean | Starts getting arms, legs and fingers |
At the end of Week 8, your baby is no longer called an embryo, but a foetus.
Pregnancy Week 5 Symptoms and Baby Development
Many women find out they’re pregnant at 5 weeks—pregnancy week-by-week development.
What Size is Baby at Week 5?
Your baby is the size of a sesame seed.
The embryo is small but it is growing rapidly.
Baby Development – Week 5
This week:
- The neural tube begins to form
- Brain and spinal cord begin to develop
- The heart begins to form
- Development of the placenta begins
Common Signs of Pregnancy in Week 5
1. LATE PERIOD
One of the biggest early signs of pregnancy.
2. Fatigues
You are feeling very tired and progesterone levels are rising.
3. Sensitivity in the breasts
Breasts may feel swollen, heavy, or sore.
4. Slight Cramping
Light cramping can occur due to implantation and expansion of the uterus.
5. Increased Urination
Hormonal changes increase blood flow to the kidneys.
6. Mood Changes
Pregnancy hormones can change how you feel fast.
Week 6 Pregnancy Symptoms and Baby Development
Symptoms usually become more apparent by Week 6.
Baby Size at 6 Weeks
Your baby is the size of a lentil grain.
Week 6 Baby Development
Key developments include:
- Heartbeat can be seen on ultrasound
- Facial features begin to form
- Legs and arms look
- Blood circulation starts
Common Signs of Pregnancy at Six Weeks
1. Nausea and Vomiting
Nausea and vomiting often start at this time.
2. Food Cravings or Food Dislikes
You might suddenly love or hate certain foods.
3. Heightened Sense of Smell
Strong smells can be overwhelming.
4. Gas and bloating
Hormones slow down the process of digestion.
5. Bowel Regularity
Progesterone relaxes muscles, including in the digestive tract.
Week 7 Pregnancy: Symptoms and Baby Development
Baby Development at Week 7 Major growth for the baby.
Baby size at week 7
Your baby is the size of a blueberry now.
Week 7 foetal development
This week:
- More rapid brain development
- Formation of the eyes and ears
- Development of tiny hands and feet
- The umbilical cord is strengthened
Week Seven Common Symptoms
1. Extreme exhaustion
Many women experience fatigue during the day.
2. Emotional state changes
It is common to be moody and emotionally sensitive.
3. Acne or Skin Changes
Hormones can influence the skin.
4. Additional saliva
Some women produce too much saliva during pregnancy.
5. Headache
Headaches can be caused by hormonal changes and dehydration.
Week 8 Pregnancy Symptoms & Baby Development
At 8 weeks pregnant, your baby’s body structures become more defined.
Week 8 Baby Size
Your baby is the size of a kidney bean.
Week 8 Baby Development
Key developments include:
- Development of fingers and toes begins
- Bones begin to develop
- Eyes become more prominent
- Internal organs continue to grow
- The baby begins to make small movements
Week 8 Pregnancy Symptoms Typical
1. Nausea and Morning Sickness
Symptoms may reach a peak at this point.
2. Vertigo
Blood pressure fluctuations can lead to dizziness.
3. Intense Food Cravings
You may notice stronger cravings.
4. Breast Augmentation
Breasts are always preparing to make milk.
5. Pregnancy Glow
Increased blood circulation may make the skin look brighter.
Baby Development: Weeks 5–8
Month 2 of pregnancy is one of the most crucial stages of foetal development.
Important Milestones
- Heart starts beating
- Developing brain and spinal cord
- Face begins to take shape
- Limbs start to show
- Rapid Placenta Development
Although the baby is still very small, development is taking place at an incredible speed.
Common Body Changes During Weeks 5–8
Your body has some adjustments to make pregnancy possible.
Physical Changes
- Breast augmentation
- Increased tiredness
- Bloating
- Urinating frequently
- Weight changes
Changes in Feelings
- Changes in mood
- Anxiety
- Excitement
- Emotional sensitivity
These changes are mainly due to the pregnancy hormones which are rising rapidly.
Pregnancy Tips Weeks 5–8 Healthy
It is really important to take care of yourself early on in pregnancy.
1. Take Pre-natal Vitamins
Folic acid during pregnancy helps support spinal cord and brain development.
2. Keep Hydrated
Drink plenty of water throughout the day.
3. Healthy Nutrition
What to focus on:
- Fruit
- Vegetables
- Protein
- Whole-grain foods
- Milk products
4. Get Plenty of Sleep
Feeling tired is common in early pregnancy.
5. Avoid Toxic Substances
Don’t:
- Tobacco use
- Alcohol
- Too much caffeine
6. Plan Your First Prenatal Appointment
The majority of women see a doctor between 6 and 8 weeks.
When Should I See a Doctor?
If you have any of these symptoms, call your health care provider:
- Profuse bleeding
- Intense abdominal pain
- Fever (high)
- Vomiting severely
- Feeling faint or dizzy
Early prenatal care is key to a healthy pregnancy.
Conclusion
Weeks 5–8 of pregnancy are a time of many important developments for mother and baby. When your baby develops from a sesame seed-sized embryo into a tiny foetus with developing arms, legs and facial features, your body will go through important physical and emotional changes.
Symptoms such as fatigue, nausea, breast tenderness and mood swings are very common during this stage. Eating healthy foods, taking prenatal vitamins, staying hydrated, and getting enough rest can help support a healthy pregnancy journey.
No two pregnancies are the same and neither are the symptoms. If you ever have concerns about your symptoms, the best thing to do is talk to your healthcare provider.
FAQs (Frequently Asked Questions)
What is the size of the baby at 5 weeks pregnant?
At 5 weeks, the baby is about the size of a sesame seed.
Can You Hear Heartbeat at 6 Weeks?
Sometimes. You might be able to hear a heartbeat on ultrasound around week 6.
Will I get cramps during Weeks 5–8?
Some mild cramping can be normal as your uterus expands. If the pain is severe seek medical help.
Why does morning sickness peak at Week 8?
In this period pregnancy hormone levels rise quickly. This means more sickness for many women.
Could I have no symptoms in early pregnancy?
Yes. Some women have very few symptoms and still have healthy pregnancies.
