Oo, grabe no! My firstborn had ganitong thick dark hair when she was born, tapos biglang nag-shed like crazy around week 3-4, I was so worried akala ko may problema siya haha, pero ang dali lang lumabas ulit ng bagong hair. A few of my mum friends had the same experience, and honestly it's just one of those surprising things nobody really warns you about! The good news is it grows back, though iba na talaga ang texture sometimes, my daughter's came in much lighter at finer, which was a total curveball.