Postpartum hair loss: why, how long, and what to do

What you must remember

Postpartum hair loss is not a loss but a recovery: the hairs that were kept growing by the estrogens of pregnancy all fall out at the same time. It starts two to four months after childbirth and resolves itself, with density returning within six to twelve months.

  • Postpartum hair loss is a recovery, not a loss
  • It starts two to four months after childbirth
  • Density returns in six to twelve months, without intervention
  • After one year, a blood test is necessary: ​​iron and thyroid.
hair loss after pregnancy

You lose clumps of hair two or three months after giving birth, and no one warned you about this. This hair loss is normal, it affects the majority of new mothers, and it has a specific hormonal explanation. Most importantly, it will stop—and there are steps you can take to speed up the return of your hair to fuller consistency.

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Why does postpartum hair loss occur?

During pregnancy, high estrogen levels prolong the hair growth phase. Far fewer hairs fall out each day than usual, resulting in a particularly thick head of hair during the third trimester. After childbirth, estrogen levels drop sharply, and all the hairs that were kept growing simultaneously enter the resting phase.

  • Hair growth during pregnancy is not accelerated growth, but rather a pause in hair loss.
  • The postpartum hair loss corresponds to making up for those months without renewal
  • It is diffuse, often more visible around the contours of the face and temples.


Postpartum hair loss often comes at the worst possible time: when you're not sleeping well, you doubt everything, and you don't quite recognize yourself anymore. I say it at every consultation: it's not a loss, it's a recovery. This hair should have fallen out during pregnancy, but it all falls out at once—and it grows back.
Dr. Julie PernetDoctor of Pharmacy & Certified Trichologist

When does postpartum hair loss begin and when does it end?

It usually begins between two and four months after childbirth, peaking around the third or fourth month. It then lasts from a few weeks to a few months and resolves on its own. Full density most often returns between six and twelve months after the shedding begins, once the new hair has reached a noticeable length.

Signs of normal postpartum hair loss

This is most likely a classic case of postpartum hair loss if you check these points:

  • Hair loss that starts two to four months after childbirth, not before
  • Diffuse hair loss all over the head, without any distinct bald patches.
  • Hair that comes loose, especially when washing and brushing
  • A clear improvement after a few months

Three situations, however, warrant medical attention: hair loss that persists beyond twelve months, associated intense fatigue, or clearly bald patches. Thyroid dysfunction and iron deficiency are common after pregnancy and can be detected with a simple blood test.

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The protocol for managing postpartum hair loss

The goal isn't to stop hair loss, which will stop on its own, but to support regrowth. We stimulate scalp microcirculation, wash with a gentle pH of 5, and avoid anything that mechanically weakens a growing hair fiber. An important point if you are breastfeeding: anti-hair loss supplements and treatments that affect hormones are not recommended during this time. A purely topical approach remains the safest.

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To remember

  • Postpartum hair loss is a recovery, not a loss
  • It starts two to four months after childbirth
  • Density returns in six to twelve months, without intervention
  • After one year, a blood test is necessary: ​​iron and thyroid.

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F.A.Q

How long does postpartum hair loss last?
Postpartum hair loss begins two to four months after childbirth and lasts from a few weeks to a few months. Full density usually returns between six and twelve months after the onset of hair loss.
Is postpartum hair loss related to breastfeeding?
No, breastfeeding is not the cause of postpartum hair loss. The trigger is the sharp drop in estrogen after childbirth, which occurs whether you breastfeed or not.
Will my hair grow back after postpartum hair loss?
Yes, in the vast majority of cases. Postpartum hair loss does not damage the follicle; it simply synchronizes its cycle. Regrowth initially appears as short hairs around the hairline.
What treatments should be used against postpartum hair loss when breastfeeding?
Opt for topical treatments. Anti-hair loss supplements and hormone-altering products are not recommended while breastfeeding. A scalp serum and a gentle shampoo with a pH of 5 remain the safest approach.
When should you consult a doctor for postpartum hair loss?
If hair loss persists beyond twelve months, if it is accompanied by intense fatigue, or if areas appear noticeably bald, then iron deficiency and thyroid dysfunction are common after pregnancy and are easily detected.

Written by

Dr. Julie Pernet

Doctor of Pharmacy & Certified Trichologist. Doctor of Pharmacy and Trichologist, founder of the DermoPilaire MakeMyMask Laboratory. She develops skincare protocols focused on scalp health, based on microbiome science and pH balance.

Dr. Julie Pernet