Grapple checks: Iterative?

[Particle_Man]

If a character has a high enough BAB, does this mean that one can (offensively) attempt to do more than one thing (during one's turn) while grappling (at the iterative rate of BAB, such as +6/+1), or does one only attempt one thing (during one's turn) per round with a grapple check, regardless of BAB?

 

[Henrix]

Yes, you get iterative grapple checks.