Can altitude cause you to skip a period? I have been at altitude (around 3000 m above sea level at least ) for the last month and a half. My period was due after being at altitude for nearly1 month however it didn t arrive, rather I had very very light spotting (whixh is unusual for m my next period hasn t arrived and it is due about now. I took a home pregrancy test about a week after my first period was due -it was negative. Could my spotting and late period be a result of altitude?