Twin: One of two children produced in the same pregnancy. Twins can develop from one ovum (egg) or from two ova (eggs). Twins who develop from a single ovum are called monozygotic or identical twins. They have identical genomes. Twins who develop from two ova that are fertilized at the same time are called dizygotic or fraternal twins. They are nonidentical and have different genomes.
Unfortunately, many women have a small amount of this hormone continuously and if the level gets high enough just before a period, you could get a false pregnancy test result. The best time to use a urine test for pregnancy is three to five days after your missed period.
It is possible to get a negative pregnancy test result when you are actually pregnant. We reveal how often it occurs and why it can happen. Wrong pregnancy test results do happen, and in fact false negatives are more common than false positives. However, itâs also important to say that this shouldnât give you false hope. A negative pregnancy test is still most likely to mean youâre not pregnant. But if you really believe you are pregnant and have pregnancy symptoms, thereâs a chance you may be right. âIf you think you may be pregnant but the pregnancy test is negative, there may be several reasons,â says our expert, midwife Nikki Khan.