Is Hair Fall During Pregnancy Normal? Causes and When to Worry

Last updated: 8 October 2026

Quick Answer: Hair fall during pregnancy is less common than most women expect, because pregnancy hormones hold more hairs in the growing phase. Losing 50 to 100 hairs a day is normal, while steady counts above 150, clumps or bald patches are a reason to see your doctor and ask about iron and thyroid tests. The big shed usually comes after delivery.

Hair fall during pregnancy surprises many women, because hair often looks its fullest in these months. When hair loss during pregnancy does happen, it usually has a specific cause: a trigger a few months earlier, low iron, a thyroid change or stress. All of these are things your doctor can test for or talk through.

Does hair really fall more during pregnancy?

For most women, no. Pregnancy hormones hold a larger share of follicles in the growing phase, so fewer hairs reach the shedding stage and hair often looks thicker, especially later in pregnancy.

The baseline helps here. The American Academy of Dermatology puts normal shedding at 50 to 100 hairs a day, while the British Association of Dermatologists counts 30 to 150 as normal, so the guides disagree at the top end. Many women shed less than their usual count while pregnant.

The mechanism is a delay, not a gain. A dermatology review explains that during the last trimesters of pregnancy, a number of hair follicles are in the growing phase and then enter the resting phase together after delivery, which is why the noticeable loss usually comes after the baby rather than before.

What are the reasons for hair fall during pregnancy?

When hair fall does happen in pregnancy, the usual reasons are a trigger two to three months earlier, low iron, a thyroid change and stress. A pattern that started before pregnancy, such as PCOS, is another. Most of these show up on a blood test or in a short conversation with your doctor.

1. A trigger two to three months back. This kind of shedding, called telogen effluvium, usually starts 2 to 3 months after its trigger and lasts 3 to 6 months. Common triggers include a high fever or illness, major weight loss (for example from severe vomiting), and stopping the contraceptive pill shortly before conceiving.
2. Low iron. NFHS-5 found 52.2% of pregnant women in India anaemic. Iron deficiency is a recognised cause of shedding, though studies disagree on how much low ferritin matters on its own, so test rather than assume.
3. Thyroid changes. Both an underactive and an overactive thyroid can cause diffuse shedding, which a blood test picks up.
4. Stress. Major emotional stress is a recognised trigger, with the same delay.
5. A pattern that began before pregnancy. Thinning at the parting that predates conception often points to female pattern hair loss or PCOS; our guide to PCOS hair thinning and hard water explains how to tell.
6. Breakage that looks like shedding. Tight styles, rough handling, heat and hard water can snap hair along the shaft; the bulb check below separates this from true shedding.

Do not start supplements on your own while pregnant. Ask for a blood count, ferritin and a thyroid test (TSH), and let the results and your doctor decide.

What happens to hair in each trimester?

Shedding is least expected in the second and third trimesters, when hormones hold most hairs in the growing phase. First-trimester shedding often traces back to a trigger before or around conception. In every trimester, clumps, patches or a steady count above 150 a day are a reason to call your doctor.

Trimester	What hormones are doing	Is shedding expected?	Red flags	What to do
First	Pregnancy hormones rising fast	Not usually; when it happens it often traces back to a trigger 2 to 3 months earlier, such as stopping the pill, illness or weight loss from vomiting	Clumps, bald patches, scalp pain, or shedding with other new symptoms	Tell your obstetrician; ask about a blood count, ferritin and TSH
Second	Higher oestrogen keeps more hairs in the growing phase	Usually less than normal	A steady count above 150 a day, or thinning at the parting	Count if worried; gentle handling and loose styles
Third	Many hairs held in the growing phase	Usually the least; hair often looks fullest	Same as the second trimester	Expect a shed after delivery; keep up the iron checks your doctor advises

How can you check whether your hair fall is normal?

Two home checks give you a number to take to your doctor: a pull test and a daily count. Do them before a wash day, because washing dislodges hairs that were already loose. Neither replaces an examination, but both tell you whether you are in the normal range.

• Pull test: hold a small bunch of about 50 to 60 hairs between your thumb and fingers close to the scalp and slide gently to the ends. Dermatologists count more than 10% coming out, that is more than about 6 hairs, as a positive test.
• Daily count: collect hairs from your comb, pillow and drain for one day, on three days across a week.

Daily count (on 3 days in a week)	What it means	What to do
Under 100	Normal on every guideline	Nothing, unless you also see patches or clumps
100 to 150	Normal on one guideline, high on the other	Recount next week and think back 2 to 3 months for a trigger
Over 150 on most days, or clumps	Above every normal range	See your doctor and ask about ferritin and thyroid (TSH) tests

Bulb or no bulb: lay 10 to 20 fallen hairs on a dark surface and look at the root end. A shed hair is full length with a small white bulb of keratin at the root (a club hair); that is the hair cycle, and water does not cause it. A hair with no bulb and a blunt or frayed end has snapped, which is breakage, the kind that hard water, heat and rough handling can add.

Where does water quality fit in?

Water does not cause pregnancy or postpartum shedding. Hormones and the hair cycle do. What hard water can change is the condition of the hair you still have, which matters more when every strand is noticeable.

Hardness is what stops soap lathering well, and the lab evidence on hair strength is mixed. Hair treated with very hard water (486.7 mg/L) for three months lost measurable tensile strength in one study, while an earlier Indian study found no change at 212.5 ppm over 30 days.

BIS IS 10500:2012 sets 200 mg/L total hardness as acceptable for drinking water and 600 mg/L as the permissible ceiling. Central Ground Water Board brochures record groundwater hardness of 100 to 600 ppm in Bengaluru Urban district and 125 to 820 mg/L across Hyderabad before the monsoon, and in Chennai more than half the samples tested in 2006 exceeded the permissible limit.

Whether it applies to you is a cheap question to answer. A TDS meter (typically ₹170 to ₹300 for a basic pen) gives a first reading but does not measure hardness; above 500 ppm, get a hardness test, which Kerala Water Authority, for example, lists at ₹140 plus a ₹100 preparation charge for a domestic sample. Our walkthrough on testing hard water at home covers each method.

If you have moved home for the pregnancy, perhaps to your parents' town for the delivery, test the new supply as well, because the readings above show how far hardness varies between cities.

The visible signs help too. Dull lengths, a film that will not rinse off and short broken pieces around the crown point at water rather than hormones, and our guide on the visible signs of hard water on hair sets them out. A hardness result above 200 mg/L is the point where a water fix is worth considering.

What hair loss treatment is safe during pregnancy?

Very little treatment is needed, and most of what helps is gentle care rather than medicine. The American Academy of Dermatology advises avoiding minoxidil in pregnancy and warns that prescription hair-loss tablets such as spironolactone and finasteride may cause birth defects. Anything topical or oral should be cleared by your doctor first.

• Lukewarm, not hot, water. Hair swells under hot water, which leaves it more prone to breakage and frizz. Condition the lengths and detangle slowly.
• Loose styles. Tight buns, ponytails and braids pull on the roots and can cause traction hair loss, which the American Academy of Dermatology warns can become permanent.
• No clarifying or chelating shampoos for now. They are stronger cleansers designed to strip mineral build-up; if you feel you need one, ask your doctor first.
• A one-week rinse test. For a week, do your final rinse with water that reads low on your TDS meter. If hair feels softer and tangles less, hardness is affecting texture, but it will not change your shedding count.
• A varied diet. The NHS advises some protein-rich foods every day in pregnancy, such as pulses, eggs, fish and nuts, and says it is best to get vitamins and minerals from food, alongside the folic acid supplement it recommends.
• Supplements as prescribed. Take what your doctor prescribes, and do not add hair supplements on your own.

Where does a tap or shower filter fit?

If your water tests hard, treating it at the tap is one of the few changes with no ingredient list attached. Care Dale makes a dermatologist-certified, clinically tested tap and shower filter that reduces hardness minerals, chlorine and sediment: the filter for municipal supply is ₹1,499, and a ₹1,899 version suits borewell and tanker water.

Be clear about the limits. The Care Dale filter is not a purification system, so it does not reduce total dissolved solids (TDS), nor does it remove iron or heavy metals. No shower filter changes hormonal shedding.

Which pregnancy hair fall myths can you ignore?

Four common myths say that washing makes hair fall out, that oiling stops it, that hair fall predicts the baby's sex, and that shedding means you are going bald. None holds up, because shedding follows hormones and the hair cycle, and washing only changes how much of it you notice on a given day.

• Washing more causes hair fall. It does not. Cleveland Clinic dermatologist Wilma Bergfeld explains that shampooing dislodges hairs already in the shedding phase, and washing less often simply means more hair comes out on wash day.
• Oiling stops pregnancy hair fall. Oil can condition the lengths, but it does not change hormones or the hair cycle, so a heavier oiling routine will not stop shedding.
• Hair fall tells you whether it is a boy or a girl. A medically reviewed Medical News Today explainer notes there is no information suggesting the severity of hair loss indicates the baby's sex.
• Shedding in pregnancy means you are going bald. Telogen shedding is temporary, usually spares the hairline, and new hair grows once it settles.

What mistakes make pregnancy hair fall worse?

Most mistakes either add breakage to normal shedding or delay the blood test that would find the real cause. Over-supplementing, tight styles, hot water, blaming the water and self-started medicines are the usual ones, and each is easy to avoid.

• Over-supplementing biotin or zinc without a test. Biotin deficiency is rare, excess zinc carries its own risks, and the American Thyroid Association notes biotin can make thyroid tests misleading, so tell your doctor you take it before a thyroid test.
• Tight styles and very hot water. Both add damage of their own on top of normal shedding.
• Blaming water for a hormonal pattern. Full-length hairs with a white bulb are shedding, and no filter or shampoo changes that; only breakage responds to lower hardness.
• Starting hair-loss medicines or serums on your own. Several are not advised in pregnancy, so check every product's active ingredient with your doctor.

How long does pregnancy hair fall last, and what happens after delivery?

Shedding during pregnancy that comes from a trigger usually settles within 3 to 6 months. The bigger, expected shed comes after delivery: it typically starts 2 to 4 months after the birth and resolves by 6 to 12 months, because it runs on a different hormonal clock.

Phase	When it starts	When it usually settles	What drives it
Shedding during pregnancy	2 to 3 months after a trigger	Within 3 to 6 months	Illness, stopping the pill, low iron, thyroid changes or stress
Shedding after delivery	About 2 to 4 months after the birth	Peaks around months 4 to 5; most women regain normal fullness by 6 to 12 months	Hormone levels falling after the birth

How common the postpartum shed is depends on who you ask: a dermatology review puts it at about 20% of women, while 91.8% of 331 Japanese mothers reported hair loss in a 2023 survey that averaged a start at 2.9 months, a peak at 5.1 and an end at 8.1.

If you are already past delivery, our guide to after pregnancy hair fall covers the month-by-month timeline, breastfeeding and what hard water adds.

When should you see a doctor about hair fall in pregnancy?

See your gynaecologist or a dermatologist if shedding stays heavy for weeks, comes out in clumps or patches, or comes with scalp pain, redness or scaling. Most causes are easy to test for, and treating them early is simpler than waiting it out.

• A daily count above 150 on most days across a week
• Hair coming out suddenly or in clumps, or round bald patches
• Scalp pain, burning, redness or scaling
• A widening parting or thinning crown, which suggests female pattern hair loss or PCOS
• Shedding that continues for more than six months

Frequently asked questions

Why is my hair falling out in the first trimester? Shedding now often reflects something 2 to 3 months earlier, such as stopping the contraceptive pill, an illness with fever, or weight loss from severe vomiting. Low ferritin and thyroid changes are the other common explanations, and both need a blood test rather than a new shampoo.

Will I lose more hair after the baby is born? Possibly, but it is temporary: the American Academy of Dermatology says shedding often starts about two months after birth and peaks around four months. Cleveland Clinic says hair should regain its fullness by your child's first birthday, and not every mother has a noticeable shed.

Which blood tests explain hair fall in pregnancy? The usual ones are a blood count for anaemia, ferritin for iron stores and TSH for thyroid function, plus any others your doctor chooses from your symptoms. Ask before starting any supplement, because the results decide whether iron or anything else is needed.

Can I use a shower filter while pregnant? Yes; a tap or shower filter only changes the water you wash with, reducing hardness minerals and chlorine. It is not a purifier, so it does not lower TDS or remove iron, heavy metals, chloramine or bacteria; check anything you are unsure about with your doctor.

Does hard water make pregnancy hair fall worse? It does not cause the shedding, but hard water can leave hair rougher and, in some lab studies, weaker, so breakage on top of shedding makes the loss look worse. A TDS reading and a hardness test tell you whether that second factor applies to you.

Can I use hair fall serums or minoxidil while pregnant? Not without your doctor's approval: the American Academy of Dermatology advises avoiding minoxidil during pregnancy, and the same caution applies to any serum listing an active ingredient you do not recognise. Gentle care and loose styles are the safe default until your doctor says otherwise.