Many times after having a baby, we start to lose some of the hair that our body retained during the pregnancy. With me, I went in for a check up about 6months after DD was born and asked if I should still be losing hair, luckily my wonderful NP decided to run a thyroid screen and sure enough, my TSH level was thru the roof. I've been on meds for over 5 years now. I'll admit that I'm not always very good about remembering my meds but I'm trying to make a more concerted effort of late.