Pregnancy
What happens to my hair after birth — and when?
You're in the third trimester, you've heard the phrase "postpartum hair loss" from a friend or a forum, and you'd rather know exactly what's coming than be ambushed by it at 3am…
You're in the third trimester, you've heard the phrase "postpartum hair loss" from a friend or a forum, and you'd rather know exactly what's coming than be ambushed by it at 3am with a handful of hair. Sensible. Women who know the timeline in advance consistently describe the shed as annoying; women caught off guard describe it as frightening. Same event, different preparation.
Why does hair shed after birth?
During pregnancy, elevated oestrogen held an unusually high proportion of your hairs in their growing phase — that's the fullness you may have enjoyed in the second and third trimester. After birth, oestrogen drops steeply, and those overheld hairs move into the resting phase together.
A resting hair doesn't fall immediately; it sits in the follicle for roughly two to three months before releasing. Which produces the signature pattern: nothing much happens for the first couple of months, then the shed arrives seemingly out of nowhere around month two to four.
How much hair will I actually lose?
More than usual, less than it feels like. A typical non-pregnant scalp sheds up to around 100 hairs a day; during the postpartum shed that can multiply severalfold for a stretch. It concentrates where you notice it most — the shower drain, your brush, your pillow, the baby's fists — which makes the volume feel more dramatic than it is.
Two anchors worth holding onto. First, you're releasing hair you retained during pregnancy, not drawing down your long-term total. Second, the follicles aren't closing — they cycle back toward regrowth after releasing.
When does it stop?
For most women the heaviest phase runs from roughly month three to month six, then tapers, with shedding back around pre-pregnancy levels by nine to twelve months. Breastfeeding, sleep deprivation, stress and plain individual variation all move those goalposts a little in either direction.
Worth knowing the exception too: if heavy shedding persists well past a year, or you're seeing distinct bald patches rather than overall thinning, book a GP appointment. Thyroid shifts and low iron are common in the postpartum year and worth checking — and they're a medical matter, not a hair-care one.
Can I prevent it?
No — and it's worth being straight about that, because you're about to be marketed to. The shed is a hormonal timeline, set in motion by birth itself. No shampoo, serum, supplement or scalp ritual changes the number of hairs that were held in the growing phase during your pregnancy or stops them releasing on schedule. Anything promising otherwise is selling to your 3am self, and your daytime self should be suspicious of it.
What you can influence is everything around the shed: how gently the hair that's staying gets treated, how comfortable your scalp feels, how your hair looks and behaves through the transition, and how prepared you are. That's a genuinely useful project — it's just a different one from prevention.
What can I do now, before it starts?
One concrete thing today: put a hair catcher over your shower drain and buy a decent detangling brush — under $30 for both. The drain catcher turns the single most alarming moment of the shed into a non-event, and a brush that slides through wet hair means the hair that isn't ready to shed doesn't get snapped out along the way.
Then, when the shed arrives on schedule, come back to the month-by-month shed guide — it covers what helps each stage look and feel better while the timeline runs its course.
This article is general information, not medical advice. Postpartum hair shedding is common and usually temporary, but everyone’s situation is different. Please speak with your GP, midwife or maternal child health nurse about your own health — especially if you’re pregnant or breastfeeding.