Is Missing 2 Menstrual Cycles Normal After Just Starting?

It's completely normal to skip them especially at this age. It's actually more common than monthly regular periods! The hormones are just starting and nothing has normalized yet. I'd suggest you teach her to keep a record, even with a code of some sort on a calendar (so it's not obvious to her friends or other visitors to the house), but don't have her hovering over it. The frustrating thing about the first few years of periods is you often have to just wait for them to arrive. If she gets symptoms she can start to learn to identify, great. But many teens don't. It's probably time to have her carry a little "sudden onset" packet in her backpack though!

Then share this record with the doctor on her next regular visit. She does not need a gynecologist at this stage - the pediatrician or family practice doctor can handle this.

It can take a few years after starting a period before girls are regular.

Again, what is it with so many women thinking regular periods are normal and irregular periods are abnormal? If anything, the opposite is true. Most women do not actually have regular periods ... unless they are taking hormones. It really isn't the norm.

Yep, totally normal. I had six months between my first and second. For many girls the first year or more are pretty sporadic. Some women eventually get regular, some don't.

That is very normal. My daughter started her period almost 2 years ago, and it's just starting to be somewhat consistent now. She would go 4 months without one or get it every 3 weeks for a couple months. Her Pediatrician said this is completely normal for the first couple years.