This document provides an overview of early pregnancy development and embryogenesis from 4-11 weeks gestation. It discusses the gestational sac, corpus luteum, embryonic development including brain vesicles and facial features. The document also covers fetal anatomy of the brain, heart, placenta and umbilical cord along with various anomalies that can be observed on ultrasound for each organ system throughout pregnancy. Key images are provided showing normal fetal anatomy and abnormalities across gestation.

1. Earlypregnancyandembryogenesis Uzm.Dr.M.EROL YAYLA Uzm.Dr.BAHRİ YILDIZ

2. The gestational sac and the corpus luteum

3. Thecorpusluteum

4. The gestational sac in 2D ultrasound at 4–6 weeks' gestation

5. The gestational sac in 3D ultrasound at 4–7 weeks' gestation

6. A close look at the gestational sac at 7 weeks' gestation

7. Embryo at 7–10 weeks' gestation

8. Brain vesicles at 8 weeks' gestation

9. Brain vesicles at 8 weeks' gestation: the unfolded embryo

10. Casts of the cerebral vesicles at 7–10 weeks' gestation

11. End of embryogenesis and beginning of fetal period: 11 weeks' gestation

12. Fetalfaces

13. Placenta

14. Normal placenta

15. Normal umbilicalcord

16. Placentaprevia

17. Placentaaccreta

18. Velamentous insertion of the cord

19. Vasaprevia

20. Chorioangioma of theplacenta

21. Molarpregnancy

22. Singleumbilicalartery

23. Umbilicalcordcyst

24. Cordhemangioma

25. Abruptioplacentae

26. Thefetalface

27. 2D sonography of the fetal face

28. 3D sonography of fetal face

29. Thefetalpalate

30. 3D ultrasound of the fetal skull

31. 3D tomography of fetal face

32. Varieties of fetal facial clefts

33. Isolatedcleftlip

34. Cleftlipandpalate

35. Bilateral cleft lip and palate

36. Facialanomalieswithholoprosencephaly

37. Lateral cleft of the fetal face

38. Micrognathia

39. Bindersyndrome

40. Apertsyndrome

41. Trigonocephaly

42. Skin tag

43. BeckwithWiedemannsyndrome

44. Thefetalbrain

45. Normal fetal brain at midgestation: basic survey

46. Normal fetal brain at midgestation: advanced examination

47. Fetal spine and neural canal

48. Cerebralvessels

49. Anencephalythroughoutgestation

50. Cephaloceles

51. Myelomeningocele

52. Myelocele

53. Holoprosencephaly

54. Facialanomalieswithholoprosencephaly

55. Agenesis of the septum pellucidum

56. Complete agenesis of the corpus callosum

57. Partial agenesis of the corpus callosum

58. Megacisternamagna

59. Dandy-Walkermalformation

60. Blake’spouchcyst

61. Vermianhypoplasia

62. Cerebrallateralventriculomegaly

63. Types of cerebral lateral ventriculomegaly

64. Intracranialhemorrhage

65. Porencephaliccyst

66. Schizencephaly: unilateralandbilateral

67. Periventricularleukomalacia

68. Brain findings with fetal cytomegalovirus infection

69. Brain findings with fetal toxoplasmosis

70. Intracranialarachnoidcysts

71. Choroidplexuscyst

72. Vein of Galen aneurysm

73. Lissencephaly

74. Unilateralmegalencephaly

75. Intracranialtumors

76. Thefetalheart

77. Normal fetussitus

78. Two-dimensional gray scale imaging of fetal cardiac connections

79. Color Doppler of fetal cardiac connections

80. Thefetalaorticarch

81. High definition flow of the fetal aortic arch

82. Color Doppler of pulmonary veins

83. Three-dimensional ultrasound of normal fetal heart

84. Two-dimensional gray scale imaging of ventricular septal defects

85. Color and pulsed Doppler of blood shunting across a muscular ventricular septal defect

86. Muscularventricularseptaldefect

87. Inletventricularseptaldefect

88. Outletventricularseptaldefect

89. Perimembranousventricularseptaldefect

90. Apicalventricularseptaldefect

91. Completeatrioventricularcanal

92. Partialatrioventricularcanal

93. Singleventricles

94. Hypoplasticleftheartsyndrome

95. Pulmonary atresia with intact ventricular septum

96. Ebstein malformation of the tricuspid valve

97. Tricuspiddysplasia

98. Tetralogy of Fallot

99. Complete transposition of great arteries

100. Doubleoutletrightventricle

101. Truncusarteriosuscommunis

102. Interruptedaorticarch

103. Coarctation/tubular hypoplasia of aortic arch

104. Aorticstenosis

105. Pulmonicstenosis

106. Cardiac anomalies associated with isomerism

107. Leftisomerism

108. Rightisomerism

109. Liver in isomerism

110. KAYNAK 1-http://www.glowm.com/?p=glowm.cml/ultrasoundAtlas#us661