What Week is Pregnancy Fatigue the Worst?

When I started working as a neonatal nurse, one of the most common questions I heard from expectant mothers was about pregnancy fatigue. Everyone wants to know when it’s going to hit hardest. 

My friend who’s in her first trimester recently asked me, “Why am I so tired all the time?” It’s a sentiment many pregnant women share, and understanding when fatigue peaks can help you prepare for those more challenging weeks.

Pregnancy fatigue is typically the worst around weeks 7-12 in the first trimester and often returns in the third trimester. During these periods, hormonal changes, increased blood production, and physical demands on your body contribute to extreme tiredness.

When Does Pregnancy Fatigue Typically Start?

Fatigue can set in as early as the first few weeks of pregnancy. For many women, it’s one of the first signs that they’re expecting. This early tiredness is largely due to rising hormone levels, especially progesterone, which has a natural sedative effect.

Why Does Pregnancy Fatigue Occur?

Pregnancy fatigue is a common experience for many women, and it's often a result of the body working harder than usual to support both you and your developing baby. Several factors contribute to this overwhelming sense of tiredness:

• Hormonal Changes: Rising levels of hormones, especially progesterone, can have a natural sedative effect, making you feel more tired.
• Increased Blood Volume: Your body produces more blood to support the growing baby, which requires extra energy and can lead to fatigue.
• Physical Demands: The physical work of growing a baby, including the increased metabolic rate and changes in your body, can be exhausting.
• Emotional Stress and Anxiety: The emotional aspects of pregnancy, such as stress and anxiety, can drain your energy.
• Excitement of Pregnancy: The anticipation and excitement can also take a toll, leaving you feeling more tired than usual.

When is Pregnancy Fatigue the Worst?

Pregnancy fatigue tends to follow a predictable pattern, though it can vary for each woman. Here’s a breakdown of when fatigue is typically at its peak:

• First Trimester (Weeks 7-12): Fatigue is usually at its worst during the first trimester, especially between weeks 7 and 12. This is when your body is rapidly adjusting to pregnancy, with a surge in hormones like progesterone, increased blood production, and the physical and emotional demands of early pregnancy—all contributing to extreme tiredness.
• Second Trimester ("Honeymoon Phase"): Many women experience a boost in energy during the second trimester. The initial hormonal surges stabilise, and the body begins to adjust, allowing for a period of relative comfort and increased vitality.
• Third Trimester: Fatigue often returns in the third trimester as your baby grows and your body becomes heavier. Sleep can become more challenging due to discomfort, frequent trips to the bathroom, and the physical demands of late pregnancy. This final stretch can leave you feeling just as exhausted as in the early weeks, if not more so.

Understanding these phases of fatigue can help you anticipate and manage your energy levels throughout your pregnancy.

How Can You Manage Pregnancy Fatigue?

Managing fatigue during pregnancy is all about finding ways to rest more effectively and maintain your energy levels. Here are some practical tips:

• Use a Maternity Pillow: A maternity pillow, like our Butterfly Maternity Pillow®, can be a game-changer for your sleep. It’s designed to support your growing belly and keep you in a comfortable side-sleeping position, preventing you from rolling onto your back. By reducing tossing and turning, it helps you get deeper, more restful sleep, which is essential for combating fatigue.
• Take Naps When Possible: Short naps during the day can help you recharge and make up for any lost sleep at night. Aim for 20-30 minute naps to avoid grogginess.
• Stay Hydrated and Eat Balanced Meals: Proper hydration and nutrition are key to keeping your energy levels up. Eating small, frequent meals that are rich in protein and complex carbs can prevent energy crashes.
• Maintain a Regular Sleep Schedule: Going to bed and waking up at the same time every day helps regulate your body's internal clock, making it easier to fall asleep and wake up refreshed.
• Engage in Gentle Exercise: Light activities like walking or prenatal yoga can boost your energy and help you sleep better at night. Just make sure to consult your healthcare provider before starting any new exercise routine.

For more tips on improving your sleep during pregnancy, I recently wrote an article that goes in-depth about dealing with sleepless nights and offers additional strategies for getting better rest.

Is Severe Fatigue a Cause for Concern?

While fatigue is normal during pregnancy, severe or persistent fatigue could signal an underlying issue like anemia or gestational diabetes.

What to Watch For:

• Unusual Exhaustion: Constant fatigue despite adequate rest.
• Shortness of Breath: Could indicate anaemia.
• Dizziness or Fainting: A potential red flag.
• Persistent Headaches: Especially with visual changes.
• Difficulty Concentrating: Trouble focusing may warrant attention.

When to See Your Doctor:

If fatigue significantly impacts your daily life or is accompanied by any of these symptoms, consult your healthcare provider to rule out serious conditions and receive proper guidance.

What Week of Pregnancy Does Fatigue Typically Improve?

Fatigue often improves during the second trimester, around week 14, as your body begins to adjust to the surge in pregnancy hormones and your energy levels start to stabilise. By this time, the placenta has fully developed and takes over hormone production, reducing the hormonal fluctuations that cause early pregnancy fatigue. Additionally, many women find a routine that works for them, helping to manage energy levels better.

However, every pregnancy is different, and factors like stress, pre-existing health conditions, or carrying multiples can cause fatigue to persist. It’s important to listen to your body and continue prioritising rest and nutrition even if you start to feel more energetic.

FAQs About Pregnancy Fatigue 

Can Pregnancy Fatigue Be Worse If I’m Carrying Twins Or Multiples?

Yes, carrying twins or multiples can increase fatigue due to the higher physical demands on your body and the increased production of pregnancy hormones.

Is It Normal To Feel More Tired During My Second Pregnancy?

It’s common to feel more fatigued during subsequent pregnancies, especially if you’re caring for a young child while pregnant, as your body has additional demands.

Does Pregnancy Fatigue Affect My Mental Health?

Chronic fatigue can impact your mood and mental health, potentially leading to feelings of irritability, anxiety, or depression. It’s important to manage fatigue to support your overall well-being.

Can Certain Foods Help Alleviate Pregnancy Fatigue?

Yes, nutrient-rich foods like leafy greens, lean proteins, and whole grains can help maintain energy levels. Avoiding excessive sugar and caffeine is also beneficial.

How Do I Know If My Fatigue Is Affecting My Baby’s Development?

While typical pregnancy fatigue doesn’t usually impact foetal development, severe or persistent fatigue should be discussed with your healthcare provider to rule out any underlying issues.

Can Dehydration Make Pregnancy Fatigue Worse?

Yes, dehydration can contribute to fatigue. It’s important to stay well-hydrated to help maintain your energy levels during pregnancy.

Closing Thoughts

Understanding when pregnancy fatigue is at its worst can help you better prepare and manage your energy levels throughout your pregnancy. Equipping yourself with the right tools, like our Butterfly Maternity Pillow®, can make a significant difference in how well you rest and ultimately how you feel.

For more maternity products designed to support your comfort and well-being during this special time, explore our store.

*The shape of the Butterfly Maternity Pillow® is a registered trade mark of Weekly Sales Pty Ltd