Thank you for your medical query at AskTheDoctor.com
I understand your concern.
You should be consistent with the dose, as the hormones respond and they fluctuate throughout the day. Only consistent use can make sure they are not going to the ovulatory stage.
The chances of pregnancy is not taken properly is little but can't be ruled out completely.
So, please take them regularly as apart from pregnancy it will also mess up your cycles if not consistent.
Hope this was helpful,
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