British drug authority makes new recommendation.
D003267:Contraception; D003270:Contraceptive Agents; D003271:Contraceptive Agents, Female; D003276:Contraceptives, Oral; D003278:Contraceptives, Oral, Hormonal; D019049:Developed Countries; D004739:England; D005060:Europe; D005193:Family Planning Services; D006113:United Kingdom
D003270:Contraceptive Agents; D003271:Contraceptive Agents, Female; D003276:Contraceptives, Oral; D003278:Contraceptives, Oral, Hormonal
Contraception; Contraceptive Agents, Estrogen--administraction and dosage; Contraceptive Agents, Estrogen--side effects; Contraceptive Agents, Female--administraction and dosage; Contraceptive Agents, Female--side effects; Contraceptive Agents--administraction and dosage; Contraceptive Agents--side effects; Contraceptive Methods--side effects; Developed Countries; England; Europe; Family Planning; Northern Europe; Oral Contraceptives--side effects; United Kingdom; Western Europe