RT Journal Article
SR Electronic
T1 Recurrent pregnancies during oral contraception
JF The Journal of the Royal College of General Practitioners
JO J R Coll Gen Pract
FD British Journal of General Practice
SP 213
OP 216
VO 27
IS 177
A1 A. P. K. John
YR 1977
UL http://bjgp.org/content/27/177/213.abstract
AB The records of the Royal College of General Practitioners' Oral Contraception Study were examined for those women who had become pregnant while using combined oral contraceptive pills. Analysis reveals that these women are much more likely than average to have further failures if they resume taking the Pill (seven failures in 35 women-years, compared with one in 500 women-years for the whole study). This finding could occur through some factor in the patient's personality (patient failure) or through some factor in the patient's metabolism.