Honestly,Put down the parenting as work experience, I'm not joking. First, it might make an adcomm laugh, or your application stand out. Second, parenting is the most important job, and I can not believe anyone would consider that a "gap."I think you are right about this profession as a whole though.
at a job interview, they may very well understand the importance of your staying home with your children. At the very least, you will have the opportunity to discuss it. The more immediate concern is how you address it on your resume.