My mothers dog Roxanne wasnt spayed until recently at 7yrs of age.
Never even a close call as far as pregnancys go. It's really not that hard to manage.

Her sister my dog Maxine was 4 or 5 when she was spayed and she went everywhere with me and almost always off leash.
No pregnancys or even close calls with her either.

My first dog a beagle , we had 10yrs before she was put down (pancreatic cancer) was never spayed and once again never a litter of pups.

Currently the smooshy faced pup we took in is a little over a year and still intact , and he has never been bred and never will. He will be neutered when hes done growing and only if he checks out ok to be put under.

Both sister dogs have even coexisted with intact males and never had an accidental litter or even a close call.

"Blessed are the flexible for they shall not get bent out of shape"
"You can discipline and Discourage or you can Discipline and Encourage"
"Gentle in what you do , But firm in how you do it"