Interaction between anticoagulants and contraceptives: an unsuspected finding.

Drug Interactions with Coumarin Anticoagulants

1971 • 178 citations

Progesterone oral contraception and blood coagulation.

1969 • 71 citations

Effect of oral contraceptives on vitamin K—dependent clotting activtiy

1967 • 56 citations

The British System for Anticoagulant Control

1975 • 13 citations

The alteration of surface charge characteristics of the vascular system by oral contraceptive steroids

1974 • 12 citations