Article: Although fish are excellent sources of omega-3 fatty acids, there is considerable risk of mercury accumulation in your body with regular consumption. Mercury can have a toxic affect on brain cells and may harm your baby, so limit fish intake during pregnancy. Flaxseed oil, linseed oil, canola oil, and olive oil contain omega-3 fatty acids without the risk of mercury. Walnuts are a mercury-free source of healthy omega-3 fatty acids. A small handful of walnuts each day can help you get a risk-free dose of omega-3 fatty acids without any health risks.
Question: What is a summary of what this article is about?
Avoid a diet heavy in fish. Use healthy cooking oils. Eat walnuts.

Problem: Article: Before getting tested for either oral or genital herpes, observe the symptoms of the disease on your body. This can not only help you get a diagnosis and treatment more quickly, but may also save you from unnecessary medical tests. The symptoms of genital herpes include: pain or itching that begins two to 10 days after being exposed to an infected sexual partner, the formation of small red bumps or tiny blisters on your genitalia, ulcers that develop when the blisters or bumps rupture, scabs that materialize while the ulcers heal. It may also be painful to urinate or you may have flu-like symptoms such as fever or muscle aches. The symptoms of oral herpes include: itching, burning, or tingling of the lips and mouth; flu-like symptoms such as sore throat and fever; and the formation and subsequent breaking of blisters or a rash. Both oral and genital herpes may be accompanied by mild to severe pain on the affected area. If you recognize symptoms of either oral or genital herpes or even suspect you might have it, see your doctor as soon as you can. This can not only help confirm a diagnosis, but also help treat the outbreak quickly and effectively. Your doctor may be able to confirm a diagnosis simply by sight or may order additional tests. Your doctor may most likely diagnose oral herpes by simply looking at your mouth area. If this is the case, she may or may not prescribe medication for you. If your case of oral herpes isn't conclusive, your doctor may order further testing. There are several different option from which she may choose, all of which can confirm a diagnosis and help you get treatment. Your doctor may conduct a DNA test called Nucleic Acid Amplification Testing (NAAT). Your doctor will swab the affected area and collect a sample. She'll run further tests on the sample to determine if you have herpes. The Polymerase chain reaction (PCR) test is the most commonly used of the NAAT tests. Your doctor may also order blood tests to examine your blood for traces of the herpes virus. Blood tests usually cause only minor discomfort. In some cases, doctors may perform a Tzanck test, though they are rarely used now. A Tzanck test requires scraping the base of lesions and collecting a skin sample. After this, your doctor will examine the specimen under the microscope to determine if you have oral herpes. This test may cause some pain and discomfort. Like oral herpes, your doctor may be able to diagnose genital herpes by conducting an examination of your genitalia and anal area. She will likely order additional tests from a lab to fully confirm a diagnosis of genital herpes. There are several types of tests that can help detect genital herpes. From viral cultures to blood tests, these may help your doctor confirm a diagnosis and develop an effective treatment plan. Your doctor may collect a tissue sample by scraping your lesions and send the cell probe to a laboratory that can detect the herpes virus. This test may cause some discomfort or pain. Your doctor may run a polymerase chain reaction, or PCR, test. The PCR test involves getting a blood or tissue sample, or a sample of spinal fluid to test for the presence of the herpes virus in your DNA. Depending on the method in which your DNA is tested, you may experience some discomfort. Your doctor may conduct a blood test, which can detect herpes virus antibodies in your blood. This test may cause minor discomfort. Once your doctor has conducted tests to confirm a diagnosis of herpes, wait for your diagnosis. This may take a few days. After you receive the test results, speak with your doctor and formulate a treatment plan if necessary.
Summary: Recognize the symptoms of herpes. See a doctor as soon as possible. Observe a case of oral herpes. Undergo tests for oral herpes. Conduct a physical examination. Have laboratory tests to confirm genital herpes. Wait for confirmation of herpes.

This trick isn't as much about levitating an actual coin as it is about the illusion of making the coin invisible, then making it reappear. To begin the trick, you will need to make the coin disappear from your hand. It's easier to learn with a larger coin like a half-dollar, but you can use a quarter or other similarly large coin. Using a finger palm vanish, pretend to transfer the coin from one hand to the other. The finger palm works like a regular palm, except you keep the coin in place with your two middle fingers. Hold the coin in place between your fingers and the first joints closest to your palm. This part of the trick is similar to a French Drop where you pretend to transfer the coin from one hand to the other while palming the coin in your original hand. While finger palming the coin, bring your empty hand up toward your eye level while you lower the hand with the coin. Rub your fingers together with your empty hand to make it look like you've made the coin "vanish". However, describe to your audience that you've simply made the coin invisible. Open your hand to reveal the invisible coin. Here, you can explain how in order to levitate the coin, you have to make it invisible so that it no longer weighs too much to float. Pretend to pick up the coin as if it were there. The next few parts of this trick will require you to be convincing with your space object work. Also note that you are picking up the invisible coin with the hand that is actually holding the coin. Keep your coin in finger palm position, and always angle your hand so the audience can't see the actual coin. Before doing this trick, practice actually picking up your real coin. Notice how the weight feels in your hand, how your fingers are positioned, and how your hand moves. Pretend as though you were picking up a coin now. Remember what it looked like when you actually picked up a coin. Don't pinch your fingers together. Even though a coin is thin, there would still be a tiny amount of space in between your fingers when holding one. Remember the weight of the coin as well. Place the invisible coin in the air and let go. Describe that you can simply put the invisible coin in the air where it will hang until you need it. Keep in mind when you do this that you will be finger palming the actual coin. As you place the coin to hang in the air, angle your hand so your audience can see the open palm, but keep the coin covered by holding it in between your fingers. Once you've let the invisible hanging coin part of the trick settle in, grab the coin out of the air with your empty hand. Take the invisible coin, paying attention to your space object work, with the hand that you're not palming the coin in. Raise the hand with the real coin in it up to meet your empty hand. As you do this, keep the coin in your finger palm but tilt your hand just enough so the audience can see that your palm is empty. Describe that whenever you need the coin back, all you have to do is make it reappear. As you place the invisible coin into the palm of the hand that is holding the actual coin, begin to curl your fingers over. As you begin to make a fist, let the coin drop out of the finger palm. It will fall over the index finger of your other hand. With your thumb, pinch the coin in between your thumb and forefinger as your other hand curls around into a fist. You will now be holding the coin in the same hand that you used to grab the invisible coin out of the air with. Open your hand to reveal that the coin has become visible again.
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One-sentence summary --
Make the coin "vanish". Pick up the invisible coin to levitate it. Grab the invisible coin. Make the coin reappear.