Tiredness after birth is expected, but postpartum fatigue that is severe, long-lasting or paired with low mood can overlap with sleep loss, nutrient needs, blood and thyroid problems and depression. That overlap is the reason to have it assessed rather than push through. The sections below show how the pieces connect and when to book a visit.
How do recovery, sleep, mood and medical issues overlap?
Sleep and mood push on each other. The NHS says that “Worry, stress and anxiety can make it harder to sleep” (NHS sleep advice). Many new parents know that loop well: broken sleep makes everything harder, and worry makes sleep harder to get back.
Mood and fatigue also travel together in the research. A 2019 systematic review and meta-analysis of 35 studies (34 on mothers) found a summary correlation of r = 0.52 between fatigue and depressive symptoms in the first two years after childbirth. The authors noted a high degree of heterogeneity, meaning the strength of that link varied a lot from study to study. Their conclusion was that careful assessment of both fatigue and depression is useful whenever either one is reported.
Medical causes sit alongside both. A 1994 American Family Physician review said postpartum fatigue “may be a symptom of significant medical or psychiatric illness” and must be distinguished from tiredness, “a common adaptive response after delivery.” It listed anemia, infections, thyroid disorders, mood disorders and cardiomyopathy as important causes. A 2024 narrative review in Women’s Health adds that severe or atypical postpartum fatigue can signal an underlying condition, such as multiple sclerosis. It describes MS-related fatigue as severe, recurrent, often not relieved by rest, and sometimes worsened by high temperatures.
You will also see the term postnatal depletion online. Kin Fertility’s guide describes it as the combination of physical, hormonal and emotional depletion after birth, and credits the term to Dr. Oscar Serrallach and his book on the subject. Kin Fertility’s guide reports that Dr. Serrallach believes over 50% of mothers have some degree of it, while a Lola&Lykke article on his postnatal depletion syndrome reports up to 50%. Both figures are one clinician’s belief, not a measured prevalence. The research on this page uses the words postpartum fatigue, so use the two terms with that difference in mind.
When should a parent seek assessment?
Book an assessment with your prenatal or postpartum care team when your fatigue is severe, does not lift with rest, lasts longer than you expect, or comes with low mood, ongoing crying or new physical symptoms. The 2024 review describes severe, recurrent, often unrelieved fatigue that worsens in heat as features of MS-related fatigue, which clinicians use to tell it apart from postpartum fatigue. If your tiredness has a similar pattern, describe it to your care team in those terms. If sleep is part of the picture, Cleveland Clinic’s sleep tips article says that if you have trouble falling asleep on a regular basis, it is worth scheduling an appointment with a sleep medicine specialist.
If you have an urgent concern, contact your clinician or local emergency services rather than waiting for an appointment.
What are the symptoms of postpartum fatigue?
Symptoms overlap, so this table shows which source names each sign and what it can point to.
| Sign or cause | Where it is named | What it can point to |
|---|---|---|
| Fatigue that is severe, recurrent or not relieved by rest | 2024 narrative review | Severe or atypical postpartum fatigue can signal an underlying condition |
| Fatigue that worsens in heat | 2024 narrative review | Described as a feature of MS-related fatigue; ask your clinician whether it fits your pattern |
| Low energy, brain fog, poor concentration and memory | Kin Fertility’s guide | Features the guide attributes to postnatal depletion |
| Low mood and crying for no reason | Lola&Lykke article; 2019 review | The Lola&Lykke article describes emotional swings such as crying for no reason; the 2019 review links fatigue with depressive symptoms |
| Anemia, infections, thyroid disorders, cardiomyopathy | 1994 American Family Physician review | Medical causes to ask about |
| Ringing in the ears, muscle cramps, pins and needles, weak hair and nails | Lola&Lykke article (a commercial site) | The article says these may indicate a vitamin deficiency and suggests checking levels; this is a commercial site’s claim, not clinical evidence |
| Falling asleep unexpectedly or struggling to wake in the morning | Kin Fertility’s guide | Listed as an effect of postnatal depletion |
Is it normal to cry every day after giving birth?
A 1996 concept analysis of postpartum fatigue notes that it has some overlap with postpartal depression and milder “baby blues,” and that it can be differentiated from them. A Lola&Lykke article on Dr. Serrallach’s postnatal depletion syndrome describes emotional swings such as crying for no reason. Daily crying that does not ease is worth raising with your clinician, who can look at mood alongside fatigue, as the 2019 review recommends.
How long does postpartum fatigue last?
Duration varies from person to person. Kin Fertility’s guide says postnatal depletion symptoms usually start in the months after birth and gradually ease as nutrition and sleep improve. For some women, it says, the condition can last much longer, up to 10 years. The 2019 review looked at the first two years after childbirth, and the 2024 review describes postpartum fatigue as occurring “in the weeks to months following delivery.” To count weeks postpartum, count from the day you gave birth. If your fatigue is still strong months later, that is the point to have it assessed.
What does Kin Fertility’s guide suggest for postnatal depletion?
The guide says postpartum care should start with getting enough of the right nutrients, which it says can support energy levels, mood and the immune system. It lists vitamin B12, vitamin A, vitamin D, choline, iron, zinc, selenium, iodine and omega-3 fatty acids. It also points to sleep and support: sleeping when the baby sleeps, sharing night shifts and accepting help. The guide says diet alone can be hard to meet these needs. The 1994 review’s list of causes, including anemia and thyroid disorders, is a reason to ask whether blood tests are needed before you decide on anything.
How can you help a postpartum mom?
Kin Fertility’s guide gives practical ideas that partners and family can start with:
- Help her sleep. The guide notes that even closing your eyes on the couch for half an hour in the afternoon can help.
- Split night shifts, so one person takes the baby while the other sleeps.
- Ask for specific help, such as a meal train, and let visitors wait until she is ready.
The guide says that “Accepting help from others is a key part of reducing your risk for postnatal depletion.”
What should you bring to your care team about supplements?
Before you start any supplement, take the question to your prenatal or postpartum care team. Bring the label of any product you are considering so they can check it against your history and any tests. Kin Fertility’s guide recommends a vitamin supplement, so ask your team whether that makes sense for you and how to decide.
What has the FDA said about supplement claims?
This is information, not legal advice. In a warning letter dated November 5, 2020, the U.S. Food and Drug Administration told Quten Research Institute that claims on its website showed two products were intended to treat or prevent disease, which made them drugs under the Federal Food, Drug, and Cosmetic Act. The letter said those products were misbranded because they lacked adequate directions for use. As of October 5, 2026, the official letter is posted on the FDA site: FDA warning letter to Quten Research Institute. Use it as a reminder to check whether a supplement’s claims about the body are backed by the sources it names.
Before your appointment: a checklist
Use this list to prepare for your visit. It draws on the signs and questions above.
- Write down when the fatigue started and whether rest changes it.
- Note any sensitivity to heat, since the 2024 review lists it as a feature of MS-related fatigue.
- Track your sleep for a week: when you sleep and what wakes you.
- Note changes in mood, crying and anxiety, and how often they happen.
- List every vitamin or supplement you take or are considering, with its label.
- Ask whether anemia, thyroid problems or other medical causes should be checked.
- Ask for fatigue and mood to be assessed together.
Tiredness after birth is common. Fatigue that is severe, lasting or linked with mood changes deserves an assessment, and your prenatal or postpartum care team is the place to start. For more on how fatigue and mood connect, see the Body Literacy Review home page.
By the Body Literacy Review Team
This article is for general information purposes only and does not constitute medical advice. Consult your doctor or qualified healthcare provider before making changes to your health routine.
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