Letter | Published:

P1 Antigen in the Human Fœtus

Naturevolume 192page883 (1961) | Download Citation



IT is well established that in the human fœtus and new-born the P1 antigen is incompletely expressed1,2. In the course of testing blood from 403 fœtuses between the ages of 12 and 28 weeks we have confirmed that the incidence of P1 is below the adult-level; however, it was found to be considerably higher in young than in old fœtuses. Moreover, in the early fœtuses the strength of the agglutination also tended to be greater.

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  1. 1

    Henningsen, K., Acta Path. Med. Scand., 26, 639 (1949).

  2. 2

    Henningsen, K., Revue d'hématologie, 5, 277 (1950).

  3. 3

    Mourant, A. E., The Distribution of the Human Blood Groups (Blackwell Scient. Pub., Oxford, 1954).

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  1. Blood Group Reference Laboratory, Lister Institute of Preventive Medicine, Chelsea Bridge Road, S.W.1

    • , H. E. M. KAY
    • , J. H. L. PLAYFAIR
    •  & A. E. MOURANT
  2. Department of Clinical Pathology, Royal Marsden Hospital, Fulham Road, London, S.W.3

    • , H. E. M. KAY
    • , J. H. L. PLAYFAIR
    •  & A. E. MOURANT


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