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Why are you so tired?
Pregnancy

Why are you so tired?

3 min readWeek 7
Key takeaways
3 min
  • Expect severe fatigue during the first trimester as your body redirects energy to support your developing baby and growing placenta.
  • Manage hormonal mood swings by understanding they're normal - you may feel joy one minute and anxiety the next due to hormone fluctuations.
  • Combat morning sickness and food aversions by identifying trigger smells and foods, then avoiding them when possible.
  • Monitor vaginal discharge changes and report unusual symptoms like strong odors, itching, or bleeding to your healthcare provider immediately.
  • Prioritize rest and self-care by taking naps throughout the day and listening to your body's signals for additional sleep.

First trimester fatigue occurs because your body redirects energy to support your developing baby and growing placenta. Rising hormone levels, particularly hCG and progesterone, combined with increased blood production and metabolic changes, cause overwhelming exhaustion that's completely normal during early pregnancy.

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Why are you so tired?

This week, you may experience fatigue and morning sickness. Perhaps one minute you are overjoyed and the next you feel down [1]. Don’t worry, you’re okay. Your hormones are starting to work overtime.

During the first trimester, it is common to experience complex emotions — a mix of joy, confusion, and anxiety. For first-time mothers, waiting for the baby's arrival is especially difficult [2]. The unusual sensations in your body can cause anxiety, irritability, and tears. Morning sickness may cause nausea and vomiting, and, throughout the day, you may experience revulsion towards smells or foods that never bothered you before [3]. And at the same time, your appetite is increasing — you can’t wait for your next meal or snack! All of these signals are actually helpful. Feeling weak, tired, or dizzy can remind you to listen carefully to your body and take care of yourself.

Most importantly, all of this is normal. The developing baby, described in the previous section, requires a ton of your body’s energy and resources, so be kind to yourself! Take naps and rest wherever you can. If you are experiencing morning sickness or revulsion to odors, learn how to deal with these uncomfortable symptoms in our Tips section.

While the baby is beginning to develop, your body is also changing and growing — the placenta forms and the uterus grows (now it’s about the size of a goose egg). Your level of hCG is increasing. The uterine isthmus softens and the cervical canal closes, filling with a viscous mucus that protects the child from possible infection.

Many expectant mothers experience dry skin during this period, because many of your body’s resources, which used to go to the renewal and hydration of your skin, are now being redirected to your developing baby. In the Nutrition section, we talk about how to support healthy skin through a balanced diet.

The changes in your body can cause a relapse of chronic inflammation of the pelvic organs. If something bothers you, tell your doctor right away so that you can start treatment, if necessary.

Discharge

Normally, discharge will be a light milky color, with a uniform consistency and a slightly sour smell. Sometimes hormonal changes and a decrease in immunity can cause yeast infections to develop. In this case, discharge becomes more abundant and curdled, with a sharp acidic odor, and is usually accompanied by painful itching and burning. Consult a doctor if the discharge changes or if you experience pain.

At this time, bloody discharge may also appear. This isn’t a cause for alarm, but do make sure to inform your doctor.


Frequently asked questions

First trimester fatigue occurs because your body is working overtime to support your developing baby. Rising hormone levels, particularly progesterone and hCG, plus the energy demands of placenta formation cause extreme exhaustion.

Yes, mood swings are completely normal during the first trimester. Rapidly changing hormone levels cause emotional ups and downs, mixing feelings of joy, anxiety, and confusion throughout the day.

Morning sickness typically begins around 6 weeks of pregnancy and can last through the first trimester. Despite its name, nausea and vomiting can occur at any time of day.

Normal early pregnancy discharge is light, milky-colored with a uniform consistency and slightly sour smell. Contact your doctor if discharge becomes heavy, curd-like, has a strong odor, or causes itching.

Combat pregnancy fatigue by taking frequent naps, going to bed earlier, eating small frequent meals, and staying hydrated. Listen to your body and rest whenever possible during this energy-demanding time.

Medical Disclaimer

This article is for informational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or qualified health provider with any questions you may have regarding a medical condition.

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Medically reviewed content

Reviewed by healthcare professionals · Updated August 13, 2025

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