[Diagnosis of gestational age in the 20th week of pregnancy].

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@article{Chiavazza1986DiagnosisOG, title={[Diagnosis of gestational age in the 20th week of pregnancy].}, author={F Chiavazza and E Kokkinaki and V De Vita and Andrea Venturini and Giuseppe Micucci and Alessandro Grignaffini}, journal={Minerva ginecologica}, year={1986}, volume={38 4}, pages={281-4} }