Students who feel comfortable with you and trust that you will keep their concerns confidential are more likely to self-identify early in the quarter. SAS students tell us that your inclusion of a syllabus statement about SAS and your making it a point to reference the statement during class contribute to that sense of comfort.
SAS implores students to notify you early about their need for accommodation; however, we cannot automatically notify you on behalf of a student without the student initiating that specific request. If it helps for planning purposes (such as planning for accommodated exam administration), SAS can share the number and the type of accommodations (but not the identities) of the SAS students eligible for accommodations in your class, although they may not all ultimately request accommodations.
Keep in mind that the main reasons students wait to notify you aren't necessarily out of disorganization or forgetfulness but that they often hope not to need accommodations, feel uncomfortable self-identifying, or may have only recently been diagnosed with their condition.