Twelve days after ovulation pregnancy test stick a deep and light phenomenon is usually normal, but will change over time to two are dark red, if not deepen, be alert to the situation of preeclampsia, ectopic pregnancy and so on.
The pregnancy test is mainly through the measurement of HCG levels in the urine, twelve days after ovulation, if the fertilized egg successfully implanted, the body’s HCG levels will increase. If fertilization and implantation is late, one dark and one light can be normal at this time, but it usually changes to two dark colors soon. If the one dark and one light color persists, it may be that the doubling of HCG is unsatisfactory, and you should be on the lookout for preterm miscarriage, ectopic pregnancy, and so on.
It is also possible that there is a problem with the quality of the pregnancy test stick, which can result in one dark and one light color, so it is recommended to change the pregnancy test stick and start from a new check.
Twelve days after the ovulation of the pregnancy test a dark and light situation, want to clarify whether they are pregnant, it is recommended to consult a doctor in a timely manner, under the guidance of the doctor to do blood HCG and other tests to further clarify.