Maternal serum free-β-chorionic gonadotrophin,pregnancy-associated plasma protein-A and fetal nuchal translucency thickness at 10–13+6 weeks in relation to co-variables in pregnant Saudi women

Maternal serum free-β-chorionic gonadotrophin,pregnancy-associated plasma protein-A and fetal nuchal translucency thickness at 10–13+6 weeks in relation to co-variables in pregnant Saudi women