Samak FAQs specialisation pics Myths and truth about the menstrual cycle Coming of age is such a hush-hush affair in our society that it is not surprising that there are a lot of myths associated with it. The little that is taught in school only heightens the curiosity rather than quench the thirst of knowledge. Access to the most current information available enables you to make informed decisions about choosing birth control methods, when to see doctors, and the changes you face as you age. In a normal cycle, a woman menstruates every 28 days.
Some women are simply never regular.
It's not possible to exactly predict your next cycle based on the last one. Almost anything can cause irregular periods, including stress, illness, recently being on the pill or using hormonal methods of birth control. This is what makes the rhythm method of birth control so unreliable. Trying to predict a time during your cycle when you can safely have sexual intercourse without fear of becoming pregnant is next to impossible. Sexual inter-course even during ovulation is risky as, though the egg lasts for only a day, sperm can last for about five days.