The delayed menstruation with a little blood is not necessarily pregnancy, there may be a menstrual disorder. 1, for women who usually have regular menstruation, a delay of 3-7 days may be a normal phenomenon, if the delay is longer, it may be a simple menstrual disorder, and a little blood may be a small amount of endometrial rupture performance, work pressure, irregular life, improper diet, mood change and other factors can cause a delayed menstruation. 2, may also represent pregnancy, especially in women who have recently had sex without contraception, and a little blood is often seen in early pregnancy. 2, may also represent pregnancy, especially in women who have recently had sex without contraception, the possibility of pregnancy is also greater, and with a little blood in the early stages of pregnancy is also a frequent phenomenon, the specific test paper test, if the test paper negative can also go to the hospital to do more accurate blood HCG test, in order to clarify whether the pregnancy.