Estimate the efficiency of a strategy of premature screening of the maternal anaemia during the first quarter of pregnancy versus the usual strategy of screening of the anaemia during the sixth month.

A part of the patient will have a NFS and dosage of the cast-iron, during the results of the beginning of the pregnancy at the first quarter.

The other part of the patients will have a NFS and at the first quater of the pregnancy.

All the patient will have a NFS at the results of the sixth month of the pregnancy.

A NFS will be done during the results at the end of the pregnancy like we do now.

Then a NFS at 48 hours after the birth. A treatment with iron will be done and according to the results

Inclusion Criteria:

• Every patient followed at the HME at the beginnig of the pregnancy

Exclusion Criteria:

• pregnency women who don't speak french
• pregnancy women affected by béta thalassemia
• pregnancy woman having had a périconceptionnel treatment against the anaemia