how long does it take for propecia to work Amniocytes 1 Amniotic fluid 1 Bone marrow 1 Buccal swab 7 Cell culture 1 Cell free DNA 2 Cerebrospinal fluid 1 Chorionic villi 1 Cord blood 1 Cystic hygroma fluid 1 Dried blood spot DBS card 2 Fetal blood 1 Fibroblasts 1 Fresh tissue 1 Frozen tissue 1 Isolated DNA 9 Paraffin block 1 Peripheral whole blood 8 Plasma 2 Saliva 9 Serum 1 Skin 1 Sputum 2 Urine 1 White blood cell prep 1