Ten days without menstruation tested negative there is a possibility of delayed menstruation, but pregnancy can not be completely ruled out. A woman’s menstrual cycle is formed by the cyclical shedding of the uterine lining under the action of hormones secreted by the ovaries. There are many reasons affecting the menstrual cycle of women such as poor mood, poor sleep, excessive work and life stress, etc. All of these may affect the secretion of estrogen and progesterone, resulting in disruption of the cycle of shedding of the endometrial lining of the uterus. The menstrual cycle may be shortened or lengthened, prolonged for about 10 days without undue concern, maintain a good state of mind, adjust the mood and continue to observe, if the menstrual period has been delayed, it is recommended to go to the hospital for consultation. Because each woman’s ovulation time for each cycle is different, so the time of conception is also different from person to person, delayed menstruation for 10 days early pregnancy test is negative, it is recommended to go to the hospital obstetrics and gynecology clinic, blood HCG and progesterone test to further determine whether the pregnancy. There are many reasons for irregular menstruation, it is recommended to go to the hospital in time to receive the guidance of a specialist, so as to avoid delaying the condition.