Norways conscription law was much stricter until very recently. Military police was looking for me to hand deliver my draft notice up until I moved abroad because doing so allows them to charge you and imprison you if you don't show. At the time women were not called in at all. It didn't stop a rapid move towards more equality. And that eventually moved towards more women in the military. Couple that with a reduced need for recruits, and it was relaxed significantly for men.

EDIT: I moved in 2000. I finally took a call from the military police the day I landed in London, to gleefully tell them I'd left - the practice was that draft notices would not be delivered abroad, so moving effectively put an end to the matter. Norwegian law also required notifying the military if you left for more than 6 months, and provide evidence. I sent them a letter; they sent me one back demanding evidence. I told them the fact I'd received the letter was evidence and to stop bothering me. They did.

Basically, for the Americans who find this weird: In the countries in Europe where this is still a thing, this is a cold war holdover most places. When I was growing up air raid sirens were being tested monthly, and my primary schools' basement was a bomb shelter. It took a lot of time before things were relaxed after the fall of the Soviet Union.