 Blood serum, blood plasma, maternal deoxyribonucleic acid DNA, urine supernatant, urine cell pellet, cervico-vaginal fluid, bacterial vaginosis BV slide, cord blood fetal DNA, cord blood serum, placenta, fetal membranes, umbilical cord segment, placenta and umbilical cord, chorionic villi and maternal decidua from clinical chorionic villus sampling CVS, amniotic fluid supernatant and cell pellet from clinical amniocentesis. 