Double X Science - It's In Your Genes

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  • Old ovaries, new eggs? Hatching a debate

    …gy is. Right now, we’re a ways from really understanding the full biology, but we’re making progress.” 1 Direct quote from the third edition of “Human Physiology: An Integrated Approach”, one published by Pearson Education in 2004 and used in medical school classes.  [Image credit: front page and thumbnail oocyte image, public domain via Wikimedia Commons. Article oocyte image also public domain, via Wikimedia Commons.] [Sarah C.P. Williams is a…

    Authored by on May 15, 2013

  • Is the bar high enough for screening breast ultrasounds for breast cancer?

    …ve dense breasts and lobbying to roll out all sorts of imaging studies quickly, no matter how well they have been studied, it would not be worth posting. Dense breasts are worrisome to women, especially young women (in their 40s particularly) because they have proved a risk factor for developing breast cancer. Doing ultrasound on every woman with dense breasts, though, who has no symptoms, and a normal mammogram potentially encompasses as many a…

    Authored by on September 21, 2012

  • Unicorns and Brainbows

    orite, shown below: A cerebellar flocculus, a lobe in the cerebellum, from the original Brainbow paper (Source) Since its original description, researchers have used the Brainbow concept extensively — it has been cited 361 times, according to the Web of Science – and extended it into zebrafish and fruit flies, both species that researchers frequently use in experiments to trace gene expression and how animals develop. But though Lich…

    Authored by on May 6, 2013

  • Autism and the DSM-5

    …ial social aspect of this change, and the one thing that might, when it comes to autism, elevate the DSM-5 above the level of doorstop. [Image credit: Dave Bullock, UK, via Wikimedia Commons under Creative Commons Attribution 2.0 generic license.]…

    Authored by on April 23, 2013

  • So What’s the Big Deal About the Higgs Boson, Anyway? A Physics Double Xplainer

    The ATLAS detector at the Large Hadron Collider, one of four detectors to discover a new particle. By Matthew Francis, physics editor After decades of searching and many promising results that didn’t pan out, scientists working at the Large Hadron Collider in Europe announced Wednesday they had found a new particle. People got really excited, and for good reason! This discovery is significant no matter how you look at it: If the…

    Authored by on July 6, 2012

  • The Fatherhood Adjustment

    …2004.01298.x “First-Time Fathers’ Study: psychological distress in expectant fathers during pregnancy,” John T. Condon, Philip Boyce, J. Barton and Carolyn J. Corkindale, Australian and New Zealand Journal of Psychiatry, Vol. 41, Issue 9 (Sep. 2007), pp. 718-725 Here’s a quick list of our contributors for  this second edition of the Carnival of Evidence-Based Parenting: The Transition to New Motherhood (Momma, PhD) Bonding in Early Motherhood:…

    Authored by on May 14, 2013

  • A behind-the-scenes look at the fungal meningitis outbreak

    Center for Disease Control and Prevention’s tabulation offungal meningitis cases and related deaths as of 12/3/12. Watching the meningitis outbreak unfold has been watching a tragedy in the making. As of this writing, 541 people in the United States have developed the disease, and 36 of them have died. The source of the outbreak was fungus-contaminated injections of an immunosuppressant steroid from a compounding pharmacy. The com…

    Authored by on December 7, 2012

  • Biology Explainer: The big 4 building blocks of life–carbohydrates, fats, proteins, and nucleic acids

    …ll selection of different materials: bricks, mortar, iron, glass, and wood. Arranged in different ways, these few materials can yield a huge variety of structures. We encountered functional groups and the SPHONC in Chapter 3. These components form the four categories of molecules of life. These Big Four biological molecules are carbohydrates, lipids, proteins, and nucleic acids. They can have many roles, from giving an organism structure to be…

    Authored by on June 8, 2012

  • After Newtown missteps, journalists get guidelines

    …almost twice as likely to say that they don’t want to live or work near a person with mental illness if they read an article about a person with mental illness involved in a mass shooting, according to a study published March 20 in the American Journal of Psychiatry. Interestingly, this tendency is the same even if the article avoids any mention of mental illness. This may be because this link between violence and mental illness is deeply engrain…

    Authored by on March 27, 2013

  • Pregnancy 101: Fertilization is another way to come together during sex

    g the zona pellucida to harden like the setting of concrete. In effect, the egg–sperm fusion induces the egg to construct a virtually impenetrable wall. Left outside in the cold, the other, unsuccessful sperm cells die within 48 hours.   Now that the sperm–egg fusion has gone down, the egg start the maturation required for embryo-fetal development. The fertilized egg, now called a zygote, begins its journey into the womb and immediately be…

    Authored by on December 3, 2011

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