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 1160784883
T1 Multifetal Pregnancy
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=1160784883
RD 2024/04/20
AB In  single-ovum  twins,  there  is  always  a  certain  area  of  the  placenta  in  which  there  is  anastomosis  between  vascular  systems  which  is  never  present  in  the  fused  placenta  of  double-ovum  twins.  Thus,  if  at  an  early  period  the  heart  of  one  embryo  is  considerably  stronger  than  that  of  the  other,  a  gradually  increasing  area  of  the  communicating  portion  of  the  placenta  is  monopolized  by  the  former,  so  that  its  heart  increases  rapidly  in  size,  whilst  that  of  the  latter  receives  less  blood  and  eventually  atrophies.—J.  Whitridge  Williams  (1903)