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NBME 23 Answers

nbme23/Block 3/Question#1 (reveal difficulty score)
A 32-year-old woman comes to the physician ...
Yolk sac๐Ÿ”,๐Ÿ“บ
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 +5 
submitted by wutuwantbruv(39),
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eTh lhaeohnoncbperm uwdol eb on eht actaul utsfe so sujt teg dri of D).( eTh cbkal" "loeh ttah het sftue si tonfglai in si teh gtiatonsale cas so tge idr of (.)C Nwo I ma on ulndtosrua rxpeet tub I nokw tath eth tnmoiaic vicyta tlalnvyeeu dpnesax ot fesu wthi hte crioohn heyrteb nietignmali teh cochrnoii ativyc ).(B In esmtr of ewrhe teh noimitac cvyait is wsnoh ni ihst ema,ig I am ont ,sreu os aymeb meseoon acn ehlp tbu tish saveel eth oykl csa cihhw lptlyycia repaspa wtinih eht eatisgtnoal asc aonrdu 5.5 wes.ek

kateinwonderland  At the end of the fourth week, the yolk sac presents the appearance of a small pear-shaped opening (traditionally called the umbilical vesicle), into the digestive tube by a long narrow tube, the vitelline duct. (Wiki) +4  
tallerthanmymom  But why does it look completely detached from the fetus? I eliminated yolk sac first because of this +  
makinallkindzofgainz  If you look reeeeeeeally closely, you'll see some signal between the yolk sac and the baby. Although you can't see the entire connection, they are connected. +5  
thotcandy  Pt is roughly 8 weeks pregnant so and typically by 9th week, Amniotic cavity has expended to fill entire volume of Gestational sac. So the entire black part around the fetus is GS/AC. +2  
euchromatin69  and also by 7 week vitelline duct obliterates between umbillicus and yolk sac +  

 +3 
submitted by thotcandy(89),
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ers34oc1t:l.4-9t0g3c6/0/7cm33j117n.Be0.2t8p10s0/-na82/8i13oh00s89sp8m2--0ne-12a./d-t0f284g

thsi ireptuc lilw hlpe. The SU ew wree ivnge is mwerseohe neetweb r3d nda ht4 ucietrp.

moFr hawt I ut,ddsrnnea the heolw gihtn si hte gtnlstieaao cs,a gnduinicl hte rncihoo nad eenvgytrih ieni.sd mrFo hee,tr tebewen teh nochiro nda hte okoanilm/yn sca si het ncihoroci .avycit

ehtn uoy avhe eht tncioiam yctvia that sngfelu eht rymeob dna oklY acs uodarn hte 3rd eew.k hnet CA sxpeand dan akste up ullf eulvmo of oiCnocrih acyitv oraund ht9 .eewk

eth yokl akstl si the only mnngeriai tignh by t7h ewek hihcw anltulevye mebesoc het liciumalb rodc. iwhch cnscoent ot teh hocnybi/or tehn the ctaelnpa.

So, pt is 8 ekwse ptrnenga, utsh CA ash ttprye humc ylulf ndpex,ead dan teh oylk asc si yint itwh a alsml livers of eth lyko saklt ilibsev nnocnectgi efsut dan sca.




 +1 
submitted by nwinkelmann(312),
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rs'eHe a TAEGR dveio eglpnxinai odtanlusur nfngsidi fo ceyprng.an 579@: si a traeg tpeircu so rfa whti lsebla fo teh olyk c,sa stnliegaaot a,kcs atfle lepo, dan ino.mna nOe hitng the osenpr einaxlnipg asid taht I gttuohh wldou eb oogd ot epek ni dmin is thta teh klyo sac oklso elki a cerehio einsdi the gitnlaeaots c.as Ao,sl shti iste has a nubch of pisuerct sa w:ell adtsulata-nighr/ram.ertstrfiii/lasei=:/orcpdtet?sp/eorgs.

zpatel  what video? +8  
usmlelol  http://www.fetalultrasound.com/online/text/3-080.HTM labelled +4  
usmlecharserssss  porn video how they make this embryo and yolk sac +1  
samsam3711  Shorter video that explains this pretty well: https://www.youtube.com/watch?v=01mMBDEthV8 +6  
focus  @samsam3711 that video is BOMB. Thank you!!! +  



 +0 
submitted by usmleuser007(419),
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ehT gtaiasenotl cas is piehcarls ni ,hepas nda ulsyual olcetda ni hte perup atpr fo teh snfduu of eht etus.ur By etpamliraxpoy 9 sewke fo aionetlgast ge,a the ioimcnta csa has edxedpna to cpcuoy eht jratimoy fo hte emvolu of het ngtaolsitea ac,s veylalntue nnedgxpai ot cudeer hte canxmyirroeetb cmooel to a tnhi alyre newteeb teh oinnma nrabmeem dna het rmeo.smed By ,tnhe het asoaligttne cas is suyallu ypilsm ecdall het "maitnico c".sa

ilmuDevoenpgerD nt eg,bimysseoner the rcyexnroibetam locmoe (or hoicioncr vtcay)i htta ctneouitsst the goasintetal asc is a intporo fo teh tnepouccs ntoicnssig of a itvacy nteweeb es'ureHs eabrmemn dna het o.rpTahtoslb

riDgun imnaforot fo eth ipvteirmi koly ,acs osem fo eth mgaiingtr ohsyblpta secll ttaeiifdefrne ntoi henaescymml slcle htta flil teh csepa eewenbt eHus'rse eaenbrmm nda hte ,rolTthpbsao nigrfom the rberxieycntaom mmrse.oed sA dlmnvteeope esoes,rpsgr slmla naelcau nbeig to romf wnhtii eht rymbeeanoctxir mdsreemo iwhhc nlaeger to meecbo het ioeeynbmcxrart l.oocme

The rnabircyxomete leomco iidsedv het reotxmrciyaben esormemd iotn otw r:esaly nybixmoacreert opainseuhrncllpc rosmedm,e icwhh isel dntceaaj ot usee'rsH bmrameen nurdao het sdtuioe fo eht virmietpi ylok a,cs dan eabornxmiretcy iuoesapclromt ee,rsomdm cihhw elsi ctedanja ot eth htalrtbtpyoocos ylrea of eth rb.emoy

heT hciiornco ytivac is sonleced by eht coincroih pe,tal hihwc is codspmeo fo na eirnn leray fo atoeusiolcpmr odseemrm adn an terou realy fo hpslraobott csl.el

I-WI--K