According to the local sports talk station, the NCAA does not check that female athletes actually are females (unlike the IOC).
They do check for steroids. What I was unclear on was whether the allowable testosterone level was any higher for males than for females.
The Olympics dropped routine gender verification in 1999. In fact, the IOC now allows transsexuals who have completed gender reassignment surgery (with certain qualifiers) to compete. The IAAF dropped gender verification in 1992. Both reserve the right to verify gender in individual cases, but after the Caster Semenya case . . . it's not likely, IMO.