First realize the term Ivy League refers to a very specific set of 8 schools: Harvard, Princeton, Yale, Columbia, Penn, Cornell, Dartmouth, and Brown. These are all private schools, with the exception of Cornell which has both private and public components.
As you can see, after an abortion the hCG levels remain up for as long as 60 days. Following an abortion a positive pregnancy test may occur for as long as 60 days post abortion when the termination procedure was successful. The following two paragraphs come from the 19the edition of Contraceptive Technology.
A negative result from a home pregnancy test means you're unlikely to be pregnant. But sometimes it means you've taken the pregnancy test too early to know for sure. Wait until a day or two after your missed period and take another test to be sure. Women sometimes find the results of pregnancy tests hard to read.