A period that is always late may indicate a longer than usual menstrual cycle, according to Everyday Health. While most women's menstrual cycle is 28 days, up to seven days plus or minus this is considered to be normal. ... More »

Pregnancy is a commonly known reason for a late period, but it isn’t the only reason why a woman’s period might be 10 days late, according to WebMD. Other reasons for a late period include stress, severe changes in weigh... More »

A period can be late due to illness, stress, medication, schedule or weight changes and pregnancy, according to About.com. Issues such as polycystic ovary syndrome or an ovarian cyst can also cause late or missed periods... More »

A light menstrual cycle can be caused by estrogen levels gaining balance, estrogen levels decreasing near menopause, an ectopic pregnancy, birth control hormones, eating disorders, stress, excessive exercising or low bod... More »

A short menstrual period of no longer than three days may indicate pregnancy if it is light and not part of the regular pattern of menstruation, according to Everyday Health. It may also indicate the beginning of puberty... More »

It is not normal to have a period that lasts for only one day, but it may not signal a serious problem as long as a woman consistently bleeds for just one day each month, according to Everyday Health. It is best to meet ... More »

Fluctuation in estrogen levels during menstruation limits the body from regulating its internal temperature, according to Everyday Health. These changes narrow the range of core temperatures that the body tolerates. When... More »