2K HB Primer Surfacer. 2K HB Primer Surfacer. 2K HB Primer Surfacer is a two-component fast curing high-build urethane primer surfacer. 2K Primer Surfacer provides exceptional build and good holdout in combination with all U-TECH topcoats.
CVS is usually performed between 10 and 13 weeks from your last menstrual period. CVS may be chosen over amniocentesis because it may be performed earlier in the pregnancy. Chorionic villus sampling detects chromosome abnormalities (i.e. Down syndrome) and genetic disorders (i.e. cystic fibrosis.).
There are four basic types of screening tests for Down syndrome. Some of these tests need to be done early in the pregnancy, while one is not done until 15 to 18 weeks of pregnancy (at around 4 months). âFirst-trimester screening is typically done at 11 to 13 weeks of pregnancy.