Obstetrical Ultrasound –I

DecidualReaction: STAGE I: •Adecidualreactionisfeatureseeninveryearlypregnancywherethereisathickeningoftheendometriumandaroundthegestationalsac. •Itconsistsofanincreaseinsecretoryfunctionsoftheendometriumattheareaofimp ...

DecidualReaction: STAGE I: •Adecidualreactionisfeatureseeninveryearlypregnancywherethereisathickeningoftheendometriumandaroundthegestationalsac. •Itconsistsofanincreaseinsecretoryfunctionsoftheendometriumattheareaofimplantation. •Thethickeningoftheendometriumvarieswiththemensuralcycle. Gestational Sac: Stage II:4thweek of pregnancy: •Thegestationalsacisthelargecavityoffluidsurroundingtheembryo.Duringearlyembryogenesisitconsistsoftheextraembryoniccoelom,alsocalledthechorioniccavity. •Thegestationalsac(GS)isthefirstsignofearlypregnancyonultrasoundandcanbeseenwithendovaginalultrasoundatapproximately3-weeksofgestationwhenthemeansacdiameter(MSD)wouldapproximatelymeasure2-3mmindiameter. Yolk Sac: Stage III5thweek of pregnancy: •Theyolksacisthefirstvisualizedstructurethatisseenwithinthegestationalsac.Itlieswithinthechorioniccavityandisroutinelyseenfrom5weeksofgestation.Itisattachedtotheembryobytheyolkstalk(vitellineduct).Astheembryoniccavitybeginstoenlarge,theyolksac(whichisextra-amniotic)movesawayfromtheembryoandeventuallydetachesfromtheyolkstalk,andisnolongerconstantlyseenafter12weeksofgestation Theyolksacisamembranoussacattachedtoanembryo,providingearlynourishmentintheformofyolk.Itfunctionsasthedevelopmentalcirculatorysystemofthehumanembryo,beforeinternalcirculationbegins. •YolksacistheOceanoflife. •ACystwithagoodechogenicrim. DecidualReaction: STAGE I: •Adecidualreactionisfeatureseeninveryearlypregnancywherethereisathickeningoftheendometriumandaroundthegestationalsac. •Itconsistsofanincreaseinsecretoryfunctionsoftheendometriumattheareaofimplantation. •Thethickeningoftheendometriumvarieswiththemensuralcycle. Gestational Sac: Stage II:4thweek of pregnancy: •Thegestationalsacisthelargecavityoffluidsurroundingtheembryo.Duringearlyembryogenesisitconsistsoftheextraembryoniccoelom,alsocalledthechorioniccavity. •Thegestationalsac(GS)isthefirstsignofearlypregnancyonultrasoundandcanbeseenwithendovaginalultrasoundatapproximately3-weeksofgestationwhenthemeansacdiameter(MSD)wouldapproximatelymeasure2-3mmindiameter. Yolk Sac: Stage III5thweek of pregnancy: •Theyolksacisthefirstvisualizedstructurethatisseenwithinthegestationalsac.Itlieswithinthechorioniccavityandisroutinelyseenfrom5weeksofgestation.Itisattachedtotheembryobytheyolkstalk(vitellineduct).Astheembryoniccavitybeginstoenlarge,theyolksac(whichisextra-amniotic)movesawayfromtheembryoandeventuallydetachesfromtheyolkstalk,andisnolongerconstantlyseenafter12weeksofgestation Theyolksacisamembranoussacattachedtoanembryo,providingearlynourishmentintheformofyolk.Itfunctionsasthedevelopmentalcirculatorysystemofthehumanembryo,beforeinternalcirculationbegins. •YolksacistheOceanoflife. •ACystwithagoodechogenicrim. DecidualReaction: STAGE I: •Adecidualreactionisfeatureseeninveryearlypregnancywherethereisathickeningoftheendometriumandaroundthegestationalsac. •Itconsistsofanincreaseinsecretoryfunctionsoftheendometriumattheareaofimplantation. •Thethickeningoftheendometriumvarieswiththemensuralcycle. Gestational Sac: Stage II:4thweek of pregnancy: •Thegestationalsacisthelargecavityoffluidsurroundingtheembryo.Duringearlyembryogenesisitconsistsoftheextraembryoniccoelom,alsocalledthechorioniccavity. •Thegestationalsac(GS)isthefirstsignofearlypregnancyonultrasoundandcanbeseenwithendovaginalultrasoundatapproximately3-weeksofgestationwhenthemeansacdiameter(MSD)wouldapproximatelymeasure2-3mmindiameter. Yolk Sac: Stage III5thweek of pregnancy: •Theyolksacisthefirstvisualizedstructurethatisseenwithinthegestationalsac.Itlieswithinthechorioniccavityandisroutinelyseenfrom5weeksofgestation.Itisattachedtotheembryobytheyolkstalk(vitellineduct).Astheembryoniccavitybeginstoenlarge,theyolksac(whichisextra-amniotic)movesawayfromtheembryoandeventuallydetachesfromtheyolkstalk,andisnolongerconstantlyseenafter12weeksofgestation Theyolksacisamembranoussacattachedtoanembryo,providingearlynourishmentintheformofyolk.Itfunctionsasthedevelopmentalcirculatorysystemofthehumanembryo,beforeinternalcirculationbegins. •YolksacistheOceanoflife. •ACystwithagoodechogenicrim. DecidualReaction: STAGE I: •Adecidualreactionisfeatureseeninveryearlypregnancywherethereisathickeningoftheendometriumandaroundthegestationalsac. •Itconsistsofanincreaseinsecretoryfunctionsoftheendometriumattheareaofimplantation. •Thethickeningoftheendometriumvarieswiththemensuralcycle. Gestational Sac: Stage II:4thweek of pregnancy: •Thegestationalsacisthelargecavityoffluidsurroundingtheembryo.Duringearlyembryogenesisitconsistsoftheextraembryoniccoelom,alsocalledthechorioniccavity. •Thegestationalsac(GS)isthefirstsignofearlypregnancyonultrasoundandcanbeseenwithendovaginalultrasoundatapproximately3-weeksofgestationwhenthemeansacdiameter(MSD)wouldapproximatelymeasure2-3mmindiameter. Yolk Sac: Stage III5thweek of pregnancy: •Theyolksacisthefirstvisualizedstructurethatisseenwithinthegestationalsac.Itlieswithinthechorioniccavityandisroutinelyseenfrom5weeksofgestation.Itisattachedtotheembryobytheyolkstalk(vitellineduct).Astheembryoniccavitybeginstoenlarge,theyolksac(whichisextra-amniotic)movesawayfromtheembryoandeventuallydetachesfromtheyolkstalk,andisnolongerconstantlyseenafter12weeksofgestation Theyolksacisamembranoussacattachedtoanembryo,providingearlynourishmentintheformofyolk.Itfunctionsasthedevelopmentalcirculatorysystemofthehumanembryo,beforeinternalcirculationbegins. •YolksacistheOceanoflife. •ACystwithagoodechogenicrim. DecidualReaction: STAGE I: •Adecidualreactionisfeatureseeninveryearlypregnancywherethereisathickeningoftheendometriumandaroundthegestationalsac. •Itconsistsofanincreaseinsecretoryfunctionsoftheendometriumattheareaofimplantation. •Thethickeningoftheendometriumvarieswiththemensuralcycle. Gestational Sac: Stage II:4thweek of pregnancy: •Thegestationalsacisthelargecavityoffluidsurroundingtheembryo.Duringearlyembryogenesisitconsistsoftheextraembryoniccoelom,alsocalledthechorioniccavity. •Thegestationalsac(GS)isthefirstsignofearlypregnancyonultrasoundandcanbeseenwithendovaginalultrasoundatapproximately3-weeksofgestationwhenthemeansacdiameter(MSD)wouldapproximatelymeasure2-3mmindiameter. Yolk Sac: Stage III5thweek of pregnancy: •Theyolksacisthefirstvisualizedstructurethatisseenwithinthegestationalsac.Itlieswithinthechorioniccavityandisroutinelyseenfrom5weeksofgestation.Itisattachedtotheembryobytheyolkstalk(vitellineduct).Astheembryoniccavitybeginstoenlarge,theyolksac(whichisextra-amniotic)movesawayfromtheembryoandeventuallydetachesfromtheyolkstalk,andisnolongerconstantlyseenafter12weeksofgestation Theyolksacisamembranoussacattachedtoanembryo,providingearlynourishmentintheformofyolk.Itfunctionsasthedevelopmentalcirculatorysystemofthehumanembryo,beforeinternalcirculationbegins. •YolksacistheOceanoflife. •ACystwithagoodechogenicrim. DecidualReaction: STAGE I: •Adecidualreactionisfeatureseeninveryearlypregnancywherethereisathickeningoftheendometriumandaroundthegestationalsac. •Itconsistsofanincreaseinsecretoryfunctionsoftheendometriumattheareaofimplantation. •Thethickeningoftheendometriumvarieswiththemensuralcycle. Gestational Sac: Stage II:4thweek of pregnancy: •Thegestationalsacisthelargecavityoffluidsurroundingtheembryo.Duringearlyembryogenesisitconsistsoftheextraembryoniccoelom,alsocalledthechorioniccavity. •Thegestationalsac(GS)isthefirstsignofearlypregnancyonultrasoundandcanbeseenwithendovaginalultrasoundatapproximately3-weeksofgestationwhenthemeansacdiameter(MSD)wouldapproximatelymeasure2-3mmindiameter. Yolk Sac: Stage III5thweek of pregnancy: •Theyolksacisthefirstvisualizedstructurethatisseenwithinthegestationalsac.Itlieswithinthechorioniccavityandisroutinelyseenfrom5weeksofgestation.Itisattachedtotheembryobytheyolkstalk(vitellineduct).Astheembryoniccavitybeginstoenlarge,theyolksac(whichisextra-amniotic)movesawayfromtheembryoandeventuallydetachesfromtheyolkstalk,andisnolongerconstantlyseenafter12weeksofgestation Theyolksacisamembranoussacattachedtoanembryo,providingearlynourishmentintheformofyolk.Itfunctionsasthedevelopmentalcirculatorysystemofthehumanembryo,beforeinternalcirculationbegins. •YolksacistheOceanoflife. •ACystwithagoodechogenicrim.