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Posts by FirstAid-RStigall

USMLE-Rx Step 1 Qmax Challenge #3527


Check out today’s Step 1 Qmax Question Challenge.

Know the answer? Post it below! Don’t forget to check back for an update with the correct answer and explanation (we’ll post it in the comments section below).

USMLE-Rx Step 1 Qmax Challenge #3527A pregnant woman presents to her obstetrician for her first scheduled prenatal examination. Her uterus is larger than it should be for the gestational age of 10 weeks, as calculated on the basis of her last menstrual period. Her ?-human chorionic gonadotropin level is elevated to >100,000 mU/mL. A transvaginal ultrasound of the uterus is performed and is shown in the image.

What are the most common karyotype and the most usual chromosomal origin in this case?

A. 46,XO; both maternal and paternal derivations
B. 46,XX; all maternally derived
C. 46,XX; all paternally derived
D. 69,XXX; extra maternal set
E. 69,XXY; extra paternal set


Want to know the ‘bottom line?’ Purchase a USMLE-Rx Subscription and get many more features, more questions, and passages from First Aid, including images, references, and other facts relevant to this question.

This practice question is an actual question from the USMLE-Rx Step 1 test bank. For more USMLE Step 1 prep, subscribe to our Flash Facts and Step 1 Express video series. Score the best deal on all three products with a Step 1 Triple Play Bundle.

The “O”bnoxious Problem with the TORCHS Mnemonic


By Joe Savarese

The Obnoxious Problem with the TORCHS MnemonicPerhaps my clever title gave away the topic of this post, but my augmented interest in the TORCHS infections (since I started my OB/GYN rotation earlier this week) has encouraged me to create a better mnemonic. First, let me review the classic one. There are multiple versions, but here is one of the most common.

TToxoplasma gondii
HHerpes simplex virus-2 and HIV

If you are a second year student, I understand this mnemonic has been drilled into your head by now. Professors probably refer to it simply as the “TORCHS infections.” My intent is not to alter the traditional mnemonic but to improve the unhelpful “Other” stem part. (more…)

USMLE-Rx Winter Special!


Warm up for the boards with a great deal on a 6-month subscription to USMLE-Rx Triple Play.

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For a limited time, you can get 6 months of USMLE-Rx Step 1 Qmax, First Aid Step 1 Flash Facts, and First Aid Step 1 Express videos for only $199 (that’s a savings of over $300 off the regular combined subscription prices)! AMSA members save $30 more!

You can even purchase your subscription now to lock in this great price and delay the start of your subscription for up to six months.

No codes! No hassles! Just a great deal! But hurry, this deal expires January 31st.

Here’s the fine print…
*Delay your subscription start for up to 6 months
**For more information on product subscriptions, go to
*** Cannot be combined with any other offer. Discount applies to only those qualifying new subscriptions purchased 1/5/2015-1/31/2015.


When Giving Your Presentation… “Just Talk”


By Luke Murray

When Giving Your Presentation Just TalkAs I wrote about in my earlier posts, ‘The Avoidable Cycle of Self-Doubt’ and ‘Give Your Presentation Backwards’, I used to be confused about what I ‘should’ be doing on wards… presentation-wise. Most of the time, I tried to do what I thought they wanted or leaned towards what the textbook said to do, or I hedged my bets by giving more information instead of less, because I was concerned I’d leave something out. I used to read every lab value and every section of the H&P out loud because…that’s what it says in Bates.

The problem was: my presentations were painfully boring because 90+% of what I was saying didn’t matter. And I was spending so much effort and brainpower collecting and reporting every last bit of information that I didn’t have the time (and my team didn’t have the patience to help me) intelligently organize and share the most important part of the H&P – the Assessment and Plan.

None of the residents presented in the classic med student way. They just talked about their patient in a generally organized way. That’s it.

Now in my second year of residency, I’m doing the same. And it’s making me a better doctor.

For example, I had a patient come into the ED last night, he was tachypnic, had increased work of breathing, and I was working him up appropriately but starting to feel in over my head and stuck in a few places, so I called my attending.

This was my ‘presentation’: (more…)

Join us for a FREE Webinar: First Aid for the USMLE Step 1 by Dr. Tao Le


Join us for a FREE Webinar on January 20th

Space is limited.

Reserve your Webinar seat now at:

This high-yield talk from Dr. Tao Le, the series editor for First Aid, will cover the basics of the USMLE Step 1 including an overview of the boards, goal setting, high-yield topics in each subject area, study strategies, review
resources, and study schedules.

Stay with us after the webinar for a live, interactive Q & A session.

Title: First Aid for the USMLE Step 1 by Dr. Tao Le

Date: Tuesday, January 20, 2015

Time: 9:00 PM – 10:00 PM EST

After registering, you will receive a confirmation email with information about how to access the Webinar.

System Requirements

PC-based attendees Required: Windows® 7, Vista, XP or 2003 Server

Macintosh®-based attendees Required: Mac OS® X 10.6 or newer

Mobile attendees Required: iPhone®, iPad®, Android™ phone or Android tablet

amsa usmlerx

Mnemonic Monday: Fetal Heart Tracings


By Haley Masterson

Reading your first fetal heart tracing can be intimidating, but you will be a pro at interpreting accelerations, early decelerations, variable decelerations, and late decelerations once you read a few hundred of them. Until then, keep this mnemonic close at hand…


Unbind Your Copy of First Aid


Love your First Aid book, but wish it was easier to use? We asked one of our blog authors, Luke Murray, to do a quick run-through of how to modify your First Aid book by unbinding, then rebinding, his own copy.


(Thanks, Luke!)

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