Why did glow change my period date?

Question

At first it was 16th now its the 14th Anyone have this happen and it be accurate?

Answer

It can change when you put a positive opk in x

Answer

It's just a prediction really. It goes by your previous cycles. If your cycles are always different then it just takes your average. Like my cycle is 30-40 days so on average from the past 5 months it's 35. So that's how they picked my date. Does that help?

Why did glow change my period date?

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