The fluid shown in the picture above represents amniotic fluid.
“The precise origin of the amniotic fluid remains unsolved and amniotic fluid is considered to be both of maternal and fetal origin.”
But this cannot help us to solve this question.
Let’s see what Williams Obs. has to say on Origin of Amniotic fluid.
‘-in early pregnancy, amniotic hula is an ultranmate or materna’ plasma. By the beginning of second trimester, it consists largely of extracellular fluid which diffuses through the fetal skin, and thus reflects the composition of fetal plasma.
After 20 weeks, however, the cornification of fetal skin prevents this diffusion and amniotic fluid is composed largely of fetal urine.”
Reading the above text, it can be concluded that in early pregnancy – Mother is the main contributor whereas during rest of the pregnancy – Fetus is the main contributor.