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Circadian variation of circulating levels of four placental proteins
Author(s) -
HOUGHTON D. J.,
NEWNHAM J. P.,
LO K.,
RICE A.,
CHARD T.
Publication year - 1982
Publication title -
bjog: an international journal of obstetrics and gynaecology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.157
H-Index - 164
eISSN - 1471-0528
pISSN - 1470-0328
DOI - 10.1111/j.1471-0528.1982.tb05035.x
Subject(s) - circadian rhythm , variation (astronomy) , period (music) , biology , endocrinology , placental lactogen , human placental lactogen , medicine , placenta , pregnancy , fetus , genetics , physics , astrophysics , acoustics
Summary. Serial plasma levels of human placental lactogen, human chorionic gonadotrophin, Schwangerschaftsprotein 1, and placental protein 5 (PP5) were examined over a 24‐h period in six subjects. All proteins showed random circadian variation, that of PP5 being considerably greater than the other three. There was no coherent pattern of fluctuation among the different proteins: the variation of each individual protein was completely independent of the others.