How many ladies have ever taken a pregnancy test in which the control line doesn't show?

Kaci • Law student. Expecting our first in May. 💙
pregnancy test in which the control line doesn't show?" />
A pregnancy test in which the control line doesn't show, otherwise known as defective. I've never personally received one but I'd like to know how common it is. I would probably be pissed just because it's a wasted test! Lol

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