your pregnent
No, she can only get her period every 6 months.
Quarterly (in other words 12 months divided by 4)
About every 3 months
It is common to experience changes in your menstrual cycle. Stress and hormonal changes can effect your cycle. Schedule a visit with your physician to make sure there are no other causes.
No it is fine to only get your period every few months. It is normal everybody is different it depends on your genes. If you have a problem you should go see your doctor but any other way it's NORMAL.
I am pretty sure it's every 6 months but sometimes they can skip one.
Check every 6-8 months.
It can if it is irregular, but for many it will stay relatively the same.
It's just your hormones are different. My beset friend gets it every three months but saw a gynecologist to get on birth control so its more regular. I think the only disadvantage to this is that you may have trouble getting pregnant in the future.
Depo Provera, it's a shot every 3 months.
Once every 11 to 12 months, accounting for the period of rest a cow gets after being bred (which will last from 2 to 3 months), and the gestation period for that cow after she has conceived.
dogs are actually infertile and dont get there period until after relations