Not all cases of "why I can't get pregnant" can be explained and categorized. Hence, 'unexplained infertility'. In fact, one in five couples will be diagnosed with this; meaning, even after all the tests, they wouldn’t know the reason behind the problem. In such cases, there's very less the couple can do, aside from continuing to try. Although, to be more certain, they are recommended to visit a different doctor/specialist and getting the tests done again.
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