RT Book, Section
A1 Cunningham, F. Gary
A1 Leveno, Kenneth J.
A1 Bloom, Steven L.
A1 Dashe, Jodi S.
A1 Hoffman, Barbara L.
A1 Casey, Brian M.
A1 Spong, Catherine Y.
SR Print(0)
ID 1160772378
T1 Implantation and Placental Development
T2 Williams Obstetrics, 25e
YR 2018
FD 2018
PB McGraw-Hill Education
PP New York, NY
SN 9781259644320
LK obgyn.mhmedical.com/content.aspx?aid=1160772378
RD 2024/04/23
AB Almost  immediately  after  the  implantation  of  the  ovum,  its  trophoblast  begins  to  proliferate  and  invade  the  surrounding  decidual  tissue.  As  it  does  so,  it  breaks  through  the  walls  of  the  maternal  capillaries,  from  which  the  blood  escapes  and  forms  cavities,  which  are  bounded  partly  by  trophoblast  and  partly  by  decidua.  The  maternal  blood  spaces  established  in  this  manner  represent  the  earliest  stages  of  the  intervillous  blood  spaces  of  the  future  placenta.—J.  Whitridge  Williams  (1903)