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

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

Tips and resources on fertility and getting pregnant.

Guest Expert Photo

What Causes Missed Periods?

Did you miss your period this month? Pregnancy is the most likely cause. But there are many others.

It could be due to stress, weight changes, and too much exercise, says WebMD guest expert Hyacinth Nicole Brown, MD. Missed periods can also be signs of medical problems that need treatment. They include hormone problems, eating disorders, and some diseases.

Irregular periods can affect your chances of getting pregnant. So if you have fewer than nine periods every 12 months, or your periods have stopped completely for three months, see a doctor. You'll need an exam and tests to see what's going on.

Have you had irregular periods? What do you think causes them?

Discussion led by Hyacinth Nicole Browne, MD Guest Expert
Next Article:

Guest Expert What is a guest expert?

Hyacinth Nicole Browne, MD, is a board certified OB/GYN and Assoc. Medical Director at Sher Institute for Reproductive Medicine in Westchester, NY... More

Read Profile

Trying to Conceive Poll

How long have you been trying to get pregnant?

View Results