Editing Chorionic villus sampling (section)

==Risks==
The risk of miscarriage in CVS is estimated to be potentially as high as 1–2%. However some recent research has suggested that only a very small number of miscarriages that occur after CVS are a direct result of the procedure.<ref>{{Cite web |title=Chorionic villus sampling - Risks |url=http://www.nhs.uk/conditions/chorionic-villus-sampling/Pages/Risks.aspx |access-date=2016-05-24 |website=[[NHS Choices]]}} Page last reviewed: 06/08/2015</ref> Apart from a risk of miscarriage, there is a risk of infection and [[amniotic fluid]] leakage. The resulting amniotic fluid leak can develop into a condition known as [[oligohydramnios]], which is low amniotic fluid level. If the resulting oligohydramnios is not treated and the amniotic fluid continues to leak it can result in the baby developing hypoplastic lungs (underdeveloped lungs).<ref>{{Cite journal |last=Wu |first=Chun-Shan |last2=Chen |first2=Chung-Ming |last3=Chou |first3=Hsiu-Chu |date=February 2017 |title=Pulmonary Hypoplasia Induced by Oligohydramnios: Findings from Animal Models and a Population-Based Study |journal=Pediatrics and Neonatology |volume=58 |issue=1 |pages=3–7 |doi=10.1016/j.pedneo.2016.04.001 |issn=2212-1692 |pmid=27324123 |doi-access=free}}</ref><ref>{{Cite journal |last=Spong |first=C. Y. |date=December 2001 |title=Preterm premature rupture of the fetal membranes complicated by oligohydramnios |journal=Clinics in Perinatology |volume=28 |issue=4 |pages=753–759, vi |doi=10.1016/s0095-5108(03)00075-7 |issn=0095-5108 |pmid=11817187}}</ref>

Additionally, there is also mild risk of limb reduction defects associated with CVS, with the risk being higher the earlier the procedure is carried.<ref>{{Cite journal |year=1995 |title=Chorionic villus sampling and amniocentesis: recommendations for prenatal counseling. Centers for Disease Control and Prevention |url=https://www.cdc.gov/mmwr/preview/mmwrhtml/00038393.htm |journal=MMWR |volume=44 |issue=RR-9 |pages=1–12 |pmid=7565548}}</ref>

It is important after having CVS that the [[obstetrician]] follows the patient closely to ensure the patient does not develop infection.{{cn|date=February 2025}}