Intrauterine growth restriction (IUGR) is associated with an increase in perinatal mortality and morbidity, as well as longer-term neurological, cognitive, cardiovascular and endocrine complications. In Europe, about 400,000 pregnancies per year are complicated by IUGR. However, antenatal diagnosis seems insufficient in clinical practice, making it impossible to recognize up to 75% of foetuses with IUGR. At a time when the use of good clinical practice has demonstrated a significant improvement in neonatal survival without severe morbidity, foetuses with IUGR are less likely to receive optimal care. Our hypothesis is that the rate of IUGR diagnosed underestimates the rate of actual IUGR.

Inclusion Criteria:

• All birth more than 24 + 0 weeks of amenorrhea at the maternity ward of the hospital Femme-Mère-Enfant
• from 1st of january 2011 to 31 december 2017.

Exclusion Criteria:

• Infants born out of the hospital and secondarily hospitalized in the hospital Femme-Mère-Enfant .
• Multiple pregnancies,
• children with congenital fetal anomalies
• pregnancies without first trimester ultrasound (to date the pregnancy)

All birth more than 24 + 0 weeks of amenorrhea at the maternity ward of the hospital Femme-Mère-Enfant from 1st of january 2011 to 31 december 2017.