Menstrual bleeding will not bother the mother, not only for all nine months of bearing a baby, but also for about six months, and sometimes a year after childbirth. Menstruation will resume only when the mother's body is fully restored. But the absence of menstruation on time, in addition to pregnancy, can also signal pathological changes in the body, a woman’s wrong lifestyle. The menstrual cycle is disturbed by:
• stress, depression and anxiety;
• strong physical activity;
• change of climate or day regimen;
• colds and viral diseases;
• the use of contraceptive drugs and strong drugs;
• obesity or starvation;
• the onset of menopause.