The hormonal changes that are brought on by pregnancy and childbirth can lead to temporary hair loss. During the last trimester of pregnancy hair growth can be increased due to overproduction of certain hormones. However, immediately after delivery these hormones decrease significantly and more hair follicles are forced into a resting phase which may be rather extended resting. During this phase hair shedding is increased but new growth does not take its place, thus leading to temporary hair loss.
