Why Is My Hair Falling Out After Pregnancy? The Honest Answer.

Your hair felt incredible during pregnancy. Fuller, thicker, more alive than it had in years. Then your baby arrived - and a few months later, so did the shedding. If you are watching your hair come out in handfuls and wondering what is happening, this post is for you. Here is the science behind what changed, why it is temporary, and how to support your hair through every stage of it.

Why Your Hair Feels So Much Thicker During Pregnancy

To understand postpartum shedding, you first need to understand what pregnancy does to your hair - and honestly, it is one of the more remarkable things your body does during those nine months.

Hair does not grow continuously. It moves through a cycle: a growth phase called anagen, a short transitional phase called catagen, and a resting phase called telogen, after which the hair sheds and the follicle begins again. Under normal conditions, around 85-90% of your hair is in the anagen phase at any one time, with the remaining 10-15% resting and preparing to fall.

During pregnancy, rising levels of oestrogen and progesterone extend the anagen phase. The signal that would normally move a follicle from growth into rest is effectively delayed. Hair that would have naturally shed stays put. Research published in the American Journal of Dermatopathology confirms that oestrogen appears to prolong the anagen phase, with postpartum hair loss linked to the subsequent drop in oestrogen and progesterone levels after delivery.

The result of this prolonged anagen phase is the hair so many women describe during pregnancy: visibly fuller, denser, more abundant. This is not imagined. It is a measurable biological change. You genuinely grew and kept more hair than usual during those months.

Your hair was not misbehaving during pregnancy. It was, for once, doing exactly what you always wanted it to do. The postpartum shed is simply the other side of that coin.

What Happens After Birth: The Postpartum Shed

After delivery, oestrogen and progesterone levels drop sharply. The extended anagen phase ends. All the follicles that were held in their growth phase during pregnancy move into the telogen (resting) phase simultaneously - and then, typically two to four months later, the shedding begins.

This is called telogen effluvium. It is not a disease. It is not permanent hair loss. It is a normal, predictable response to a major hormonal transition - the largest oestrogen drop most women will experience outside of menopause.

The shed typically peaks between three and six months postpartum and resolves within six to twelve months of giving birth for most women. The clinical research confirms this: by one year postpartum, anagen and telogen ratios had returned to pre-pregnancy norms across the study group.

What about breastfeeding?

Breastfeeding can extend and intensify the shedding. The same JEADV study found that at four months postpartum, the anagen rate in breastfeeding mothers was significantly higher than in non-breastfeeding mothers - suggesting breastfeeding partially maintains the hormonal environment that delays the shed. The trade-off is that once breastfeeding stops, the shed can be more pronounced.

By one year postpartum, however, there was no statistically significant difference in hair cycle ratios between the two groups. The timing may vary. The outcome does not.

If you are breastfeeding and noticing the shedding lasting longer than expected: this is a very likely reason. It does not mean something is wrong. It means your body is still prioritising something more important than your hair right now.

When Should You Be Concerned?

Postpartum telogen effluvium is self-limiting. But there are situations where shedding may indicate something that warrants a conversation with your GP.

Consider speaking to a doctor if: the shedding has not improved at all by twelve months postpartum; if you are noticing patchy rather than diffuse shedding; if the loss is concentrated heavily at the hairline or temples without any signs of regrowth; or if you are experiencing other symptoms such as significant fatigue, cold sensitivity, or changes in weight - which may point to a thyroid issue that can be triggered or unmasked by the demands of pregnancy and birth.

For the vast majority of postpartum women, the shed is temporary and resolves on its own. What you can control is the environment you create for regrowth - and how gently you handle your hair while it is at its most vulnerable.

How to Support Your Hair Through the Postpartum Period

There is no product that will stop telogen effluvium - and any brand that claims otherwise is not being honest with you. What you can do is protect the hair you have from additional breakage, nourish the scalp to create the best conditions for regrowth, and handle new growth with care as it comes through.

These are the four products I reach for when supporting postpartum hair.

What Does the Research Say?

Frequently Asked Questions