The 51 days of pregnancy is 7 weeks plus 2 days, 1 week is 7 days and go by that. 1 week of pregnancy is 7 days, 4 weeks is 1 month, the entire pregnancy is 40 weeks, 280 days, 10 months, and 51 days of pregnancy is 7 weeks plus 2 days. Pregnancy 51 days is the early stage of pregnancy, through the ultrasound examination may be seen in the uterine cavity of the yolk sac, embryonic buds, fetal heart development, or may have been unable to see the gestational sac, it is necessary to consider the ectopic pregnancy. Pregnancy 51 days time is relatively early, some pregnant women by the body’s hormone levels, may appear early pregnancy reaction symptoms, such as nausea, vomiting, loss of appetite, drowsiness, frequent urination and other manifestations of this stage can not be blindly medication, do not arbitrarily contact with chemical substances. Regularly do a good job of pregnancy and obstetric examination after pregnancy, there are abnormalities timely detection and treatment.