Lecture 4A P3 Flashcards
Amniotic cavity is seen when
7-8 weeks
The amniotic cavity slowly increase as
Fluid accumulates in the cavity
Why does the amniotic cavity increase more rapidly at 9 weeks
Fetal urine starts to be produced
When will amnion fill the entire amniotic cavity
14-16 weeks
When will amnion fuse with walls of GS (chorion)
16-20 weeks
What is the double bleb sign
The appearance of the amniotic sac, the YS and embryo between them
When can the umbilical cord be seen
End of 6th week
The umbilical cord will contain
2 arteries, a vein and the allantois
When will vessel be more apparent in the umbilical cord?
2nd trimester
What is the allantois
Closely associated with umbilical cord
Part of connecting stalk
Will contain waste in early pregnancy
Vitelline duct is associate with umbilical cord and where
Not within the cord
Vitelline duct aka
Omphalomesenteric duct
Yolk stalk
Umbilical cord cyst may be seen in ____ week but should dissapear by ____
8th
12th
Are cysts in umbilical during trimester pathological
No but can be sign of downs in 2nd and 3rd
Characteristics of first trimester
Presence of a Gestational Sac (location within the uterus)
Presence/absence of a Yolk Sac
Presence of embryo
Presence/absence of cardiac activity
Fetal number (next week)
Fetal anatomy as appropriate (late 1st tri)
Uterus, ovaries, adnexal structures and cul-de-sac.
