All three women have a play, wenwen, Andy and I haven't seen each other for a long time.

       Andy said: "some time ago I didn't come to menstruation, pregnancy test paper test, the result is negative, thought can be relieved, but then are nausea, vomiting of pregnancy reaction, had to the hospital. Result the hospital proved to be pregnant. I wonder, early pregnancy test paper clearly show is negative, how can be pregnant? Little red herb, what do you say this is?

      "It's not surprising." I said, "although early pregnancy test paper is a simple test method, there are some problems in the process of using it."
"First of all, the urine collection should be collected using disposable diaper or clean containers, and the urine should not be diluted with a large amount of water before urine is diluted and the results can be judged. Morning urine tests work best."
"Open the paper packaging, one end of the test paper have the arrow should be inserted into the urine specimen containers, take out after 5 seconds flat, observation shows the result, but must pay attention to the insert urine test paper shall not exceed its maximum depth marker."
"Early pregnancy test paper has two lines, respectively representing the detection line and the control line. Such as line and control line position each show reaction of a red line, the tip was pregnant: only appeared in the control line position response of a red line, tip not pregnant: such as the whole test paper no red line appears reaction, or only appears in the test line position response of a red line, indicates that the test failed or test fails, try again."
"That's what I did." Andy interjected.
I went on to say: "besides the above, you must pay attention to some problems. If the morning pregnancy test paper is a disposable product, should be used in the effective period, beware of the test paper moisture. Alcohol may interfere with test results, so it's not appropriate to use after drinking. In addition, the concentration of the markers in the early stage of pregnancy was very low, and the results were negative. If you still suspect that you have a pregnancy, you can retest it after 48 hours.
"There is also a point to be noticed, using early pregnancy test paper to test, can be sure whether pregnant, but can not judge whether is normal pregnancy or abnormal pregnancy. Therefore, after the positive response, we should go to the hospital for further examination. Because there are some abnormal pregnancies such as ectopic pregnancy and mole pregnancy, the positive reaction can occur. If it is normal pregnancy, it can lead to severe bleeding and life threatening.
After some explanation, the two sisters understood.