Progestin-only methods are very effective.
Keller
S
S
D003267:Contraception; D003270:Contraceptive Agents; D003271:Contraceptive Agents, Female; D005193:Family Planning Services
D003270:Contraceptive Agents; D003271:Contraceptive Agents, Female
Contraception; Contraceptive Agents; Contraceptive Agents, Female; Contraceptive Agents, Progestin; Contraceptive Effectiveness; Contraceptive Mode Of Action; Family Planning