Should a Charter School Be Able to Require Students to Take a Pregnancy Test?

They are not private, but I agree, even if they were, it's not right.
Charter school
From Wikipedia, the free encyclopedia
Charter schools are primary or secondary schools that receive public money (and like other schools, may also receive private donations) but are not subject to some of the rules, regulations, and statutes that apply to other public schools in exchange for some type of accountability for producing certain results, which are set forth in each school's charter.[1] Charter schools are opened and attended by choice.[2] While charter schools provide an alternative to other public schools, they are part of the public education system and are not allowed to charge tuition. Where enrollment in a charter school is oversubscribed, admission is frequently allocated by lottery-based admissions systems. However, the lottery is open to all students.[3] In a 2008 survey of United States charter schools, 59% of the schools reported that they had a waiting list, averaging 198 students.[4] Some charter schools provide a curriculum that specializes in a certain field—e.g., arts, mathematics, or vocational training. Others attempt to provide a better and more efficient general education than nearby public schools. Charter school students take state-mandated exams.[5]
Some charter schools are founded by teachers, parents, or activists who feel restricted by traditional public schools.[6] State-authorized charters (schools not chartered by local school districts) are often established by non-profit groups, universities, and some government entities.[7] Additionally, school districts sometimes permit corporations to manage chains of charter schools. The schools themselves are still non-profit, in the same way that public schools may be managed by a for-profit corporation. Corporate management does not affect the status of a school. In the United States, though the percentage of students educated in charter schools varies by school district, only in the New Orleans Public Schools system are the majority of children educated within independent public charter schools.[8]

http://www.convergemag.com/bl...
I recommend reading the whole article but I've pulled out these two tidbits that answer the question better than I could.
Think of a teen who has morning sickness (or all day as I had for all my pregnancies!) and then the possible health issues that arise like gestational diabetes, toxemia, or --anything else. Now think of a teen like that in this environment:
"A charter school is an elementary or secondary school that can receive public funding, but is freed from some of the rules and regulations that apply to public schools in exchange for some type of accountability for producing a specified result."

"Charter schools, however, have the ability to hold their students to higher standards, and consistently and fairly enforce rules and consequences. Because the students know exactly what is expected of them, they follow rules, respond to boundaries, ultimately allowing them to achieve at higher levels because all they have to do is focus on achieving. "

If you want to go to a Charter School, you sign a contract. There are lotteries to get in and not all of the 'studious ones' get chosen.
How many teen girls do you see walking the halls of their public high schools who are 7-8-or 9 months along? None that I've ever heard of. They get booted out to be home-schooled by the district (depending on the family situation/district). It is an insurance nightmare for the school districts in that if anything, ANYTHING, should happen to the little mom or baby at school, a lawsuit is to be expected.

Should they be able to drug test? Yes. SHould they have weapons checks--JUST LIKE REGULAR SCHOOLS DO? Yes. Why not pregnancy testing then? They aren't telling the girl to get an abortion (as the public schools encourage), they are just testing and keeping them accountable to their contract.