Pregnancy changes the body in ways that are not always talked about openly, and hair loss is one of them. Shedding, thinning, or changes in hair texture affect a significant number of women during and after pregnancy, yet many are caught off guard when it happens to them.
Pregnancy hair loss is common, generally temporary, and for most women, fully reversible. It is not a sign that something is permanently wrong. This article explains why it happens, what to expect at each stage, and what treatment options are available.
To understand hair loss in pregnancy, it helps to understand how the hair growth cycle works. Hair follicles cycle through four phases: the anagen (growth) phase, the catagen (transitional) phase, the telogen and exogen (resting and shedding) phase. Under normal circumstances, roughly 85 to 90% of hair is in the active growth phase at any given time, with the remainder resting or shedding.
Pregnancy alters this cycle significantly, and not always in the same direction for everyone.
Oestrogen, which rises substantially during pregnancy, is a growth-promoting hormone that prolongs the anagen phase. This is why many women notice thicker and fuller hair, particularly from the second trimester onwards. Progesterone, however, can cause the hair shaft to become drier and more prone to breakage in some individuals, which is why brittleness rather than fullness is the experience for others. Individual responses to hormonal fluctuation vary considerably.
Whilst postpartum shedding is the more common and better documented pattern, some women do experience noticeable hair loss during pregnancy itself, particularly in the first trimester.
During the first trimester, the body is undergoing rapid and significant hormonal adjustment to support early foetal development. This hormonal upheaval can trigger a condition called telogen effluvium, in which a larger than usual proportion of hair follicles are pushed prematurely into the resting (telogen) phase. Instead of losing the average 80 to 100 hairs a day, some women may shed considerably more. Stress on the body during this stage can push 30% or more of hair into the resting phase, meaning some women may lose up to 300 hairs a day during periods of significant hormonal disruption.
Telogen effluvium in pregnancy typically does not cause patchy or localised hair loss. It tends to be diffuse, affecting the whole scalp evenly. It is also generally temporary. As hormones begin to stabilise in the second trimester, the shedding usually slows and hair growth patterns often recover.
Hair loss in the first trimester may also be exacerbated by the following factors:
Nutritional deficiencies. The increased demands of early pregnancy, combined with nausea and appetite changes, can reduce intake of iron, folate, zinc, and protein, all of which play a role in hair follicle health. Iron deficiency anaemia is particularly common in pregnancy and is a well-recognised trigger for telogen effluvium.
Physical and emotional stress. Pregnancy itself, especially in the first trimester, can represent a significant physiological stressor. High cortisol levels associated with stress have been shown to disrupt hair follicle activity.
Thyroid dysfunction. Both hypothyroidism and hyperthyroidism, neither of which is uncommon in pregnancy, can cause diffuse hair thinning. If hair loss is accompanied by symptoms such as fatigue, weight changes, palpitations, or temperature sensitivity, thyroid function should be assessed.
If hair loss continues beyond the first trimester without any improvement, it is worth raising with your midwife or GP. Persistent shedding mid-pregnancy is less typical and may indicate an underlying condition requiring investigation. However, for some women, the experience is the opposite. Noticeably thicker and fuller hair typically begins in the second trimester as elevated oestrogen prolongs the anagen phase, meaning hair that would ordinarily shed stays on the scalp for longer. This temporary accumulation sets the stage for what often follows after delivery.
Telogen effluvium, as mentioned is more commonly seen in the post-partum (after delivery) stage. This form of hair loss is the most clinically significant and widely experienced form of pregnancy related hair change. After delivery, oestrogen and progesterone levels fall sharply as the body returns towards its pre-pregnancy hormonal baseline. This hormonal drop signals the hair follicles that had been retained during pregnancy to enter the resting phase simultaneously, and several months later, they shed.
The result is a wave of widespread shedding that typically begins around 2 to 3 months after delivery and peaks at approximately 4 to 5 months postpartum. For most women, hair thickness returns to its pre-pregnancy baseline by 6 to 12 months after delivery. Postpartum telogen effluvium is normal and does not cause permanent hair loss in the vast majority of cases.
It is also worth noting that breastfeeding duration may influence the extent of hair shedding. Breastfeeding suppresses oestrogen by disrupting the hormonal signals that would otherwise restore normal ovarian cycles, which can delay the return of the hair growth phase. Women who breastfeed for longer may find their hair takes more time to recover as a result. This is not a reason to stop breastfeeding, and it does not mean the hair loss is more serious. It is simply a reflection of how oestrogen levels are managed differently during lactation, and hair growth typically resumes once breastfeeding concludes and hormones begin to rebalance.
There is no treatment that prevents or accelerates recovery from telogen effluvium in pregnancy, but several approaches can support hair health and, in the postpartum period, actively aid regrowth.
Because results build gradually, the improvements look natural and progressive. For people searching for the best hair loss treatment, mesotherapy often forms an important part of a wider plan.
Nutritional support. Adequate intake of iron, protein, biotin, zinc, and folate supports hair follicle function. Prenatal vitamins recommended by a doctor can help address gaps caused by dietary restriction or increased nutritional demand during and after pregnancy. If iron deficiency is suspected, blood tests should be arranged rather than self-supplementing.
Gentle hair care. Avoiding excessive heat styling, tight hairstyles such as high ponytails or braids, and aggressive brushing reduces mechanical breakage. Wide-tooth combs and sulphate-free shampoos are commonly recommended during periods of increased hair loss.
Scalp massage. Regular, gentle scalp massage may support circulation to the hair follicles. Clinical evidence is limited, but it is low risk and many women find it beneficial.
PRP (Platelet-Rich Plasma) therapy. Once breastfeeding has ended and hormone levels have stabilised, PRP therapy can be a clinically supported option for women experiencing persistent postpartum hair loss. The treatment involves drawing a small amount of the patient’s own blood, concentrating the platelet-rich plasma, and injecting it into the scalp to stimulate dormant hair follicles and promote regrowth. It is a non-surgical, well-tolerated procedure with a growing evidence base for telogen effluvium and female pattern hair loss.
Mesotherapy. Mesotherapy for hair loss involves delivering a bespoke blend of vitamins, minerals, and growth factors directly into the scalp via micro-injections. It is designed to nourish hair follicles, improve scalp circulation, and encourage the return of the anagen growth phase. Like PRP, it is most appropriate after the postpartum period has settled and should always be carried out by a qualified practitioner following a clinical assessment.
Both PRP and mesotherapy are most effective when hair loss is identified early and the underlying hormonal shift has begun to resolve. A consultation with a trichologist or dermatologist can help determine whether either treatment is appropriate and what realistic outcomes to expect.
Minoxidil, the most widely available topical hair loss treatment, is not recommended during pregnancy or breastfeeding. The same applies to many other topical and oral hair loss medications. Any pharmacological treatment for hair loss should only be considered under medical supervision and only after pregnancy and breastfeeding have concluded.
Hair loss during or after pregnancy should be assessed by a doctor if shedding is patchy or localised rather than diffuse, if loss continues beyond 12 months postpartum without improvement, if it is accompanied by fatigue, weight changes, palpitations, or other symptoms suggesting thyroid disease or anaemia, or if the scalp shows signs of inflammation, redness, or scarring. Conditions including iron deficiency anaemia, thyroid dysfunction, and androgenetic alopecia can all present or worsen during and after pregnancy, and each requires specific investigation and management.
