Assertion: amnion | /r/HasProperty | bag of waters
Facets:
value: sometimes
type: TEMPORAL
value: commonly
type: TEMPORAL
Source sentences:
text: Amnionitis is an infection of the uterus, the amniotic sac (bag of waters), and in some cases, of the fetus.
text: The amniotic sac, commonly called the bag of waters, sometimes the membranes, is the sac in which the fetus develops in amniotes.
text: The amniotic sac and the fluid it contains are sometimes referred to as the bag of waters.
text: The amniotic sac (bag of waters) is composed of two layers – the inner layer called the amnion and the outer layer, called the chorion.
text: The amniotic sac , commonly called the bag of waters ,  sometimes the membranes ,  is the sac in which the fetus develops in amniotes .
text: The amniotic sac and the fluid it contains are sometimes referred to as the bag of waters.