Find Information About:

Drugs & Supplements

Get information and reviews on prescription drugs, over-the-counter medications, vitamins, and supplements. Search by name or medical condition.

Pill Identifier

Pill Identifier

Having trouble identifying your pills?

Enter the shape, color, or imprint of your prescription or OTC drug. Our pill identification tool will display pictures that you can compare to your pill.

Get Started
My Medicine

My Medicine

Save your medicine, check interactions, sign up for FDA alerts, create family profiles and more.

Get Started

WebMD Health Experts and Community

Talk to health experts and other people like you in WebMD's Communities. It's a safe forum where you can create or participate in support groups and discussions about health topics that interest you.

  • Second Opinion

    Second Opinion

    Read expert perspectives on popular health topics.

  • Community


    Connect with people like you, and get expert guidance on living a healthy life.

Got a health question? Get answers provided by leading organizations, doctors, and experts.

Get Answers

Sign up to receive WebMD's award-winning content delivered to your inbox.

Sign Up

What Causes Missed Periods?
Hyacinth Nicole Browne, MD posted:
The first thing that comes to mind when a woman tells me that she's missed her period is that she must be pregnant. But, besides the obvious, missed periods can sometimes signify a more serious problem that can affect long-term health (i.e. development of osteoporosis) or one's chance of getting pregnant. A missed period usually indicates a problem at the level of the brain, ovaries, or uterus, and it can be due to a hormonal dysfunction at any level in the reproductive system, an acquired disease, or a congenital abnormality. The list of potential causes for a missed period is long, but some common reasons include: stress, extremes of weight, eating disorders, chronic illness, and excessive exercise.

In order to establish the cause for missed periods, a thorough history and physical examination should be performed with additional testing that addresses each level of the reproductive axis (i.e. brain, ovaries, uterus). The evaluation may reveal that more than one system is involved here. I generally recommend that women be evaluated if they have had complete cessation of menses for 3 months or irregular periods for fewer than 9 cycles per year. When in doubt, always contact your physician.
LouiseJohnson responded:
Hello my name is Louise and Im 28 yrs old and i get regular periods each month im actually calculated as every 26 days but Ive been ttc for 22 months with no luck Im very healthy I also got my thyroid and egg reserved checked and it came back normal but I have a small fibriod could this be hindering me what should I do about this matter....
Dahlila78 responded:
Hi there, my b/f and well I don't know I dont usually talk about stuff like this but I am 35 I usually have my periods around the 14th but the past 3 months it has been at the end of the month. Well me and my bf decided to make love on the 15 of this month of June thinking it was safe because I dont start know till the end of the month so I thought. But after we made love I was a little freak because this is the first time he actually went inside me and I was just there in shock. Then 3 days later I started my period. My mom says that just because I started my period and started sooner then normal doesn't mean nothing that I might have high rick of getting preg and I should keep an eye out for next month and if I dont start then I need to go in to get checked out or take a test is she right is that possible.. Never been pg before is this poss

Featuring Experts

David Walmer, MD, PhD is a reproductive endocrinologist and infertility specialist at Atlantic Reproductive Medicine Specialists . During his 25 year...More

Helpful Tips

New Committee Opinion on Female Fertility TestingExpert
New Guidelines on Fertility Testing! American Society for Reproductive Medicine (ASRM) released a Committee Opinion on evaluation of the ... More
Was this Helpful?
9 of 9 found this helpful

Related Drug Reviews

  • Drug Name User Reviews

Report Problems With Your Medications to the FDA

FDAYou are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.

For more information, visit the Duke Fertility Center