Get your thyroid levels and iron levels checked. Both often drop after baby. What many people don’t understand is the science behind postpartum hair loss. Here goes-During pregnancy, your bodies natural shedding process is significantly slowed or stopped. Once hormones level out after pregnancy, you will shed the hair you normally would have lost during those past 9 months AND be back to your normal shedding pattern. You will see clumps come out postpartum, but should not see your hair get thinner than pre-pregnancy. That often indicates something more going on, hence the recommendation to have thyroid and iron checked.