Editing Polyhydramnios (section)

{{short description|Excess of amniotic fluid in the amniotic sac}}
{{Infobox medical condition (new)
| name            = 
| synonyms        = Polyhydramnion, hydramnios, polyhydramnios
| image           = Ultrasound Scan ND 145330 1455290 cr.png
| caption         = 
| pronounce       = 
| field           = 
| symptoms        =
| complications   =
| onset           =
| duration        =
| types           = 
| causes          =
| risks           = 
| diagnosis       =
| differential    =
| prevention      =
| treatment       =
| medication      =
| prognosis       =
| frequency       =
| deaths          = 
}}
'''Polyhydramnios''' is a medical condition describing an excess of [[amniotic fluid]] in the [[amniotic sac]]. It is seen in about 1% of pregnancies.<ref>{{cite journal | author = Alexander ES, Spitz HB, Clark RA | year = 1982 | title = Sonography of polyhydramnios | journal = AJR Am J Roentgenol | volume = 138 | issue = 2 | pages = 343–6 | doi = 10.2214/ajr.138.2.343 | pmid = 7034509 }}</ref><ref>{{cite journal | pmid = 3540761 | volume=69 | title=Polyhydramnios: ultrasonically detected prevalence and neonatal outcome | date=January 1987 | author=Hill LM, Breckle R, Thomas ML, Fries JK | journal=Obstet Gynecol | issue=1 | pages=21–5 }}</ref><ref>{{cite journal | pmid = 453266 | volume=134 | title=Ultrasound in the diagnosis of congenital anomalies | date=June 1979 | author=Hobbins JC, Grannum PA, Berkowitz RL, Silverman R, Mahoney MJ | journal=Am. J. Obstet. Gynecol. | issue=3 | pages=331–45 | doi=10.1016/s0002-9378(16)33043-5 }}</ref>  It is typically diagnosed when the [[amniotic fluid index]] (AFI) is greater than 24&nbsp;cm.<ref name="Barnhard">{{cite journal | author = Barnhard Y, Bar-Hava I, Divon MY | date = Nov 1995 | title = Is polyhydramnios in an ultrasonographically normal fetus an indication for genetic evaluation? | journal = Obstet Gynecol | volume = 173 | issue = 5| pages = 1523–7 | doi = 10.1016/0002-9378(95)90643-6 | pmid = 7503195 }}</ref><ref>{{cite journal | author = Brady K, Polzin WJ, Kopelman JN, Read JA | year = 1992 | title = Risk of chromosomal abnormalities in patients with idiopathic polyhydramnios | journal = Obstet Gynecol | volume = 79 | issue = 2 | pages = 234–8 | pmid = 1731291 }}</ref>
There are two clinical varieties of polyhydramnios: chronic polyhydramnios where excess amniotic fluid accumulates gradually, and acute polyhydramnios where excess amniotic fluid collects rapidly.

The opposite to polyhydramnios is [[oligohydramnios]], not enough amniotic fluid.