https://www.parents.com/can-twins-cause-a-false-negative-pregnancy-test-8411678
Are Twins the Culprit Behind Your False Negative Pregnancy Test?
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https://www.babycenter.com/getting-pregnant/pregnancy-tests/negative-at-home-pregnancy-test-how-accurate-are-pregnancy-t_10315124
What does a negative pregnancy test mean – and could it be a false negative? | BabyCenter
Here are some common causes of a negative pregnancy test, and how to avoid a false negative.
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https://www.babycenter.com/getting-pregnant/pregnancy-tests/can-twins-cause-false-negative-pregnancy-test_41001528
Can twins cause a false negative pregnancy test? | BabyCenter
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