The weight increase of the placenta and embryo in early human pregnancy. (The placento-fetal index).

The Journal of obstetrics and gynaecology of the British Commonwealth

PubMedID: 5355383

Gellén J, Györi I. The weight increase of the placenta and embryo in early human pregnancy. (The placento-fetal index). J Obstet Gynaecol Br Commonw. 1969;76(11):990-2.
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