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“PROLONGED PREGNANCY” AFTER ORAL CONTRACEPTIVE THERAPY
Author(s) -
Freeman A. P.,
Freeman Z. S.
Publication year - 1981
Publication title -
medical journal of australia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.904
H-Index - 131
eISSN - 1326-5377
pISSN - 0025-729X
DOI - 10.5694/j.1326-5377.1981.tb135897.x
Subject(s) - medicine , pregnancy , gestation , obstetrics , ovulation , gynecology , prospective cohort study , surgery , hormone , genetics , biology
A prospective study of 151 patients whose last menstrual period was an oral contraceptive induced haemorrhage indicated that, in many, ovulation was considerably delayed and that the calculated due date of delivery was therefore erroneous; prolonged pregnancy (more than 42 weeks gestation) occurred in 37.4% and, in 9%, gestation exceeded 44 weeks.