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  • Title: The effect of parity on placental weight and birth weight: interaction with placental alkaline phosphatase polymorphism.
    Author: Chakraborty R, Das SR, Roy M, Mukherjee BN, Das SK.
    Journal: Ann Hum Biol; 1975 Jul; 2(3):227-34. PubMed ID: 16431676.
    Abstract:
    The effect of parity on placental weight and birth weight is examined through a series of birth records from an Indian population in Calcutta. Placental weight and birth weight increase with parity, the maximum increment occurring between parities 1 and 2. This is compatible with a hypothesis of sensitization of the mother to foetal, paternally derived, antigens. The three common placental alkaline phosphatase enzymic genotypes have no effect on determining foetal development.
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