What causes hair loss during pregnancy?Both men and women lose an average of around 50 to 100 hairs each day. During pregnancy, rising estrogen levels slow down the natural cycle of hair follicle shedding. As a result, some women may actually lose fewer hairs while pregnant. But that’s not always the case.
Hormonal shift
Some women may experience hair thinning and shedding due to stress or shock. This condition is called telogen effluvium, and it affects a small number of women during pregnancy.
The first trimester may stress the body as the balance of hormones shifts dramatically to support the growing baby. Stress may put more of the hairs on your head, 30 percent or more, into the telogen or “resting” phase of the hair life cycle. So, instead of losing the average 100 hairs a day, you may lose 300 hairs a day.
Hair loss due to hormonal shifts may not happen right away. Instead, it may take two to four months to notice thinning. This condition doesn’t generally last longer than six months and doesn’t result in permanent hair loss.