It is also common for women to experience hair loss after pregnancy when their oestrogen returns to normal levels. This causes the additional hair from the growth phase to change to the resting phase, which then falls out more than usual, until around 3-4 months after your child is born. This hair loss is usually nothing to worry about – your hair growth will return to normal by the time your baby is around 12 months old. If you feel your hair loss is excessive, or your hair growth has not returned to normal by 12 months, speak to your doctor