Wyeth-Ayerst introduces Alesse; OC expands range of low-dose pills.
D000569:Americas; D003267:Contraception; D003276:Contraceptives, Oral; D019049:Developed Countries; D005193:Family Planning Services; D009656:North America; D014481:United States
D003276:Contraceptives, Oral
Americas; Contraception; Contraceptive Methods; Developed Countries; Family Planning; North America; Northern America; Oral Contraceptives; Oral Contraceptives, Low-dose; United States