hey there, i originally posted in june and then again at the end of july. i just wanted to give you an update for those parents out there who are freaking out (as i was). my daughter's hair has ALL grown back in!! i'd even say it's a little thicker than before. it started in march of 2012 and by the end of june 2012 she was completely bald. i mean, old-man, shiny head bald. the most frightening time of my parenting life so far. in july we started seeing tiny little hairs coming back in, and since then it's all grown in at a normal rate and is probably about 3 inches long now and starting to curl up a little on the sides. there was actually a little spot on the back that grew in a little slower, but i'm guessing that was where she sleeps.
but in the end we're pretty sure it was telogen effluvium caused by an unknown virus/high fever she had had in january 2012. 3 months later is when she started losing her hair. throughout the first half of 2012, she was also going through all kind of other skin issues---she had eczema and about 4 or 5 other random acute skin issues that were all just popping up one after the next. we did all kinds of blood/allergy tests and everything was totally normal....so we had to just wait and see, which you can not underestimate the stress and agony as a parent of waiting and seeing if your baby girl's hair is all going to fall out and then IF it's going to grow back in, so do know you're not alone if that's where you are right now.
i certainly can't say that the hair growth will happen for everyone (i bet it will happen for most though), but in our situation we just kept focusing on the future and not letting that situation completely take over our lives (as hard as it was to ignore weird stares, etc.)....and eventually it grew back. all of it! don't loose hope and try to protect your child from thinking something is wrong with her/him. if you have to tell people not to talk about it in front of her/him than do that (i.e. grandparents or unknowing adult friends). they may not even notice at such a young age, but if they do, remind them that everyone's body is different and that no matter how they look they are perfect just the way they are.