nipt test results

doctor said my baby’s father needs his blood drawn because something is in the grey area however i didn’t understand her. does anyone know what it could be? i tried calling back and no answer so i left a voicemail hoping i received a call back soon. she also said it may or may not affect the baby. i just want peace of mind and to know my baby is okay 😩💔 they did have to test for sickle cell since it runs in his family.