Trisomy 21 risk based on maternal age+Pregnancy associated plasma protein A+Choriogonadotropin+Nuchal translucency &#x7C; Fetus &#x7C; Chemistry - non-challenge
trisomy 21 risk based on maternal age+pregnancy associated plasma protein a+choriogonadotropin+nuchal translucency &#x7c; fetus &#x7c; chemistry - non-challenge
Trisomy 21 risk based on maternal age+Pregnancy associated plasma protein A+Choriogonadotropin+Nuchal translucency &#x7C; Fetus &#x7C; Chemistry - non-challenge
trisomy 21 risk based on maternal age+pregnancy associated plasma protein a+choriogonadotropin+nuchal translucency &#x7c; fetus &#x7c; chemistry - non-challenge