Identical twinning and oral contraception.
Emery
A E
AE
D001695:Biology; D003267:Contraception; D003270:Contraceptive Agents; D003271:Contraceptive Agents, Female; D003276:Contraceptives, Oral; D019049:Developed Countries; D004739:England; D005060:Europe; D005193:Family Planning Services; D005823:Genetics; D005828:Genetics, Population; D011247:Pregnancy; D011256:Pregnancy Outcome; D012606:Scotland; D006113:United Kingdom; D014852:Wales
D003270:Contraceptive Agents; D003271:Contraceptive Agents, Female; D003276:Contraceptives, Oral
Biology; Contraception; Contraceptive Agents; Contraceptive Agents, Female; Contraceptive Methods; Developed Countries; England; Europe; Family Planning; Genetics; Genetics, Population; Northern Europe; Oral Contraceptives; Pregnancy; Pregnancy Outcomes; Scotland; United Kingdom; Wales