[header] How to tell if you're pregnant without a test [title] Pay attention to your menstrual cycle. [step] Pregnant women do not menstruate during the course of their pregnancies. If you miss a period, that is usually the most obvious indicator that you are pregnant. 
Nonetheless, you can miss periods for other reasons, such as stress or even overexercising. [substeps] If you don't already, get in the habit of keeping track of your menstrual cycle so that you can better detect a late or missed period.