[The noninvasive prenatal testing for Down's Syndrome. Retrospective study of 8821 patients]. / Le dépistage prénatal non invasif de la trisomie 21. Étude rétrospective à propos de 8821 patientes.

OBJECTIVE: To demonstrate the decrease in intrauterine invasive procedures through analysis of DNA fetoplacental free circulating in maternal blood: Non Invasive Prenatal Test (NIPT), in Prenatal Diagnosis Center of American Hospital of Paris (AHP). MATERIALS AND METHODS: Retrospective descriptive study of 8821 patients in Prenatal Diagnosis Center at the AHP between 01/01/2012 and 09/25/2014. The NIPT is available to patients since 1st January 2013. RESULTS: The number of invasive procedures decreased significantly (P<0.0001) between 2012 (n=1177, i.e. 42 % of the global activity of the Prenatal Diagnosis Center at the AHP in 2012) and 2013 (n=987 or 28.5 %) and between 2013 and 2014 (n=599 or 23.4 %). The NIPT calculated performance statistics are: sensitivity≥99.9 %; specificity=99.8 %; Positive Predictive Value=90.4 %; Negative Predictive Value≥99.9 %; False Positives=3. While the actual screening statistic values are: sensitivity≥95.4 %; specificity=82.5 %; Positive Predictive Value=6.5 %; Negative Predictive Value=99.9 %; False Positives=1197. The NIPT has reduced the number of invasive procedures at the Prenatal Diagnosis Center at the AHP. The NIPT performances are superior to those of the actual screening.

[A suspected case of in utero transmission of influenza A (H1N1) 2009]. / Un possible cas de transmission in utero du virus de la grippe A (H1N1).

A 34-year-old woman consulted the day before a scheduled caesarean for dry cough. A positive rhinopharyngeal sample for PCR testing for influenza A H1N1 led to a curative oseltamivir (Tamiflu®) treatment. At delivery a direct contact between the newborn and mother lasted only few seconds. The first healthy baby boy developped dry cough with a rhinopharyngeal sample positive for A H1N1. The minimal contact between mother and child and the positive neonatal sample only four hours after birth allow to think that it is a rare case of prenatal transmission of influenza A H1N1 to the fetus.