Assertion: amnion | /r/MadeOf | normal fetus
Facets:
Source sentences:
text: One amniotic sac contained a normal fetus [Figure 1]a, while the other amniotic sac had a set of conjoined twins fused through the thorax and abdomen with two heads, two separate hearts, four arms, four legs, and a single umbilical cord [Figure 1]b.