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Dr. Andrew Rynne
MD
Dr. Andrew Rynne

Family Physician

Exp 50 years

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What Causes Irregular Vaginal Bleeding?

I have been taking nori day since September last year following the birth of my second child. I take this at the same time each day. In the last two weeks I have begun having irregular vaginal bleeding, is this normal after being on this pill for a number of months?
Mon, 9 Jan 2017
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OBGYN 's  Response
Hello, and I hope I can help you today.

Noriday is one brand of the class of birth control pills called progesterone only pills or POp's. POP's generally do not produce regular menstrual periods, as there is a constant dose of hormones all month long rather than estrogen containing birth control pills, which are designed to give you a monthly menstrual cycle.

However the one thing you should be aware of is that POP's are much less effective than combined oral contraceptives, being only about 92% effective in preventing pregnancy. If you are breast-feeding, the hormones that cause your body to make milk also inhibit ovulation to some degree so in breast-feeding women POP's are about as effective as combined cyclic oral contraceptives.

However, irregular bleeding is not unusual as a side effect of the pills that you are taking and is not cause for concern.

I hope that I was able to adequately answer your question today, and that this information was reassuring.

Best wishes,

Dr. Brown
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What Causes Irregular Vaginal Bleeding?

Hello, and I hope I can help you today. Noriday is one brand of the class of birth control pills called progesterone only pills or POp s. POP s generally do not produce regular menstrual periods, as there is a constant dose of hormones all month long rather than estrogen containing birth control pills, which are designed to give you a monthly menstrual cycle. However the one thing you should be aware of is that POP s are much less effective than combined oral contraceptives, being only about 92% effective in preventing pregnancy. If you are breast-feeding, the hormones that cause your body to make milk also inhibit ovulation to some degree so in breast-feeding women POP s are about as effective as combined cyclic oral contraceptives. However, irregular bleeding is not unusual as a side effect of the pills that you are taking and is not cause for concern. I hope that I was able to adequately answer your question today, and that this information was reassuring. Best wishes, Dr. Brown