Amnion and amniotic sac

See also
Amniotic sac
Amnios

amniotic lesions
See also
Placenta amnion (amnios )

See also
meconial aspiration

Etiology
infectious chorioamnionitis
heritable connective tissue diseases

Components
The fetal membranes are membranes associated with the developing fetus. The two chorioamniotic membranes are the amnion and the chorion, which make up the amniotic sac that surrounds and protects the fetus. The other fetal membranes are the allantois and the secondary umbilical vesicle.
Pathology
amniotic membrane infections infectious chorioamniotis
amniotic band syndrome amniotic membrane fragility heritable connective tissue (...)

Definition: Excess of amniotic fluid.
Associations - Predisposing factors - ETiology
multiple pregnancy
major malformations anencephaly esophageal atresia congenital diaphragmatic hernia spina bifida small intestinal obstruction intestinal atresia fetal intestinal volvulus
chromosomal diseases trisomy 21 trisomy 18
fetal myotonic dystrophia (Steinert myotonic dystrophia)
Prader-Willi syndrome (#12704750#)
myasthenia gravis (#8372081#)
Perlman syndrome
placental (...)

Types
amniotic fluid quantity anomalies oligohydramnios polyhydramnios
amniotic fluid quality anomalies amniotic fluid infections meconium-stained amniotic fluid

References
Saad AG, Heffelfinger S, Stanek J. Amniotic sac infection syndrome features fetal lung neuroendocrine cell hyperfunction. Pediatr Dev Pathol. 2003 Nov-Dec;6(6):484-94. PMID: #15018448#
Redline RW, Faye-Petersen O, Heller D, Qureshi F, Savell V, Vogler C; Society for Pediatric Pathology, Perinatal Section, Amniotic Fluid Infection Nosology Committee. Amniotic infection syndrome: nosology and reproducibility of placental reaction patterns. Pediatr Dev Pathol. 2003 (...)

WKP
Definition : The amniotic sac is the sac in which the embryo and later fetus develops in amniotes. It is a thin but tough transparent pair of membranes that hold a developing embryo (and later fetus) until shortly before birth.
The inner of these membranes, the amnion, encloses the amniotic cavity, containing the amniotic fluid and the embryo.
The outer membrane, the chorion, contains the amnion and is part of the placenta. On the outer side, the amniotic sac is connected to the (...)

See also
amniotic fluid anomalies amniotic fluid quantity anomalies oligohydramnios polyhydramnios amniotic fluid quality anomalies amniotic fluid infections meconium-stained amniotic fluid
aspiration of amniotic fluid (amniotic aspiration)
References
Cell-free DNA fragmentation patterns in amniotic fluid identify genetic abnormalities and changes due to storage. Peter I, Tighiouart H, Lapaire O, Johnson KL, Bianchi DW, Terrin N. Diagn Mol Pathol. 2008 Sep;17(3):185-90. PMID: (...)