Weak positive and then turning white but pregnant is related to the quality of the test paper, expiration date, and measurement method, as well as early pregnancy and unstable HCG levels in the urine. Common Causes Early pregnancy test strips expired or bought pirated versions of early pregnancy test strips, this kind of situation may occur. In addition, if you do not follow the correct method when measuring, you may not be able to measure correctly, so you can buy test strips from the pharmacy and follow the instructions again. A similar situation may occur in early pregnancy when there is less HCG in the urine. Generally, a more accurate result may be obtained by using early pregnancy test strips after 2 weeks of coitus or 10 days of delayed menstruation. Early pregnancy test paper test should be for reference only, to determine whether pregnancy needs to be combined with the blood HCG level and vaginal ultrasound results, when the blood HCG level rises significantly, and at the same time ultrasound shows that there is a gestational sac in the uterus, can be diagnosed pregnancy. Precautions The first 4 months of pregnancy is the critical period of fetal neural tube development, pregnant women should try to avoid all kinds of undesirable factors, such as tobacco, alcohol, harmful chemicals, poor air circulation environment, etc., and at the same time to strengthen the nutrition, to prepare for their own health and fetal development, but do not overeat and drink, to prevent over-obesity and difficult situations in childbirth. Pregnancy may be due to excessive pressure, physical discomfort appeared bad mood, need to be accompanied by more family members more enlightenment, to help pregnant women healthy through the pregnancy.