scholarly journals Mortality associated with oral contraceptive use: 25 year follow up of cohort of 46 000 women from Royal College of General Practitioners' oral contraception study

BMJ ◽  
1999 ◽  
Vol 318 (7176) ◽  
pp. 96-100 ◽  
Author(s):  
V. Beral ◽  
C. Hermon ◽  
C. Kay ◽  
P. Hannaford ◽  
S. Darby ◽  
...  
Keyword(s):  
Oral Contraceptive ◽  
General Practitioners ◽  
Royal College ◽  
Contraceptive Use ◽  
Oral Contraception ◽  
Oral Contraceptive Use

Does the Use of Oral Contraception Depress DZ Twinning Rates?

1987 ◽  
Vol 36 (3) ◽  
pp. 409-415 ◽  
Author(s):  
D. Campbell ◽  
B. Thompson ◽  
C. Pritchard ◽  
M. Samphier
Keyword(s):  
Oral Contraceptive ◽  
Oral Contraceptives ◽  
Early Pregnancy ◽  
Contraceptive Use ◽  
Oral Contraception ◽  
Secular Trends ◽  
Control Groups ◽  
Blood Samples ◽  
Oral Contraceptive Use

AbstractData based on total births from a geographically defined population with zygosity determined from blood samples and placentation and with data on the use of oral contraceptives routinely collected in early pregnancy showed no association between oral contraceptive use prior to pregnancy in either MZ or DZ twinning. Three mutually exclusive control groups of singletons were used to take account of age, parity and secular trends.

scholarly journals Oral contraceptive use and mortality after 36 years of follow-up in the Nurses' Health Study: prospective cohort study

BMJ ◽  
2014 ◽  
Vol 349 (oct31 7) ◽  
pp. g6356-g6356 ◽  
Author(s):  
B. M. Charlton ◽  
J. W. Rich-Edwards ◽  
G. A. Colditz ◽  
S. A. Missmer ◽  
B. A. Rosner ◽  
...  
Keyword(s):  
Cohort Study ◽  
Oral Contraceptive ◽  
Prospective Cohort Study ◽  
Prospective Cohort ◽  
Contraceptive Use ◽  
Health Study ◽  
Oral Contraceptive Use
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