PT  - JOURNAL ARTICLE
AU  - John, A. P. K.
TI  - Recurrent pregnancies during oral contraception
DP  - 1977 Apr 01
TA  - The Journal of the Royal College of General Practitioners
PG  - 213--216
VI  - 27
IP  - 177
4099  - http://bjgp.org/content/27/177/213.short
4100  - http://bjgp.org/content/27/177/213.full
SO  - J R Coll Gen Pract1977 Apr 01; 27
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.