Electronic monitor, transdermal patches may be available by year 2000.
D001695:Biology; D003267:Contraception; D004467:Economics; D004703:Endocrine System; D005193:Family Planning Services; D006728:Hormones; D010827:Physiology; D013672:Technology
D006728:Hormones
Biology; Contraception; Economic Factors; Endocrine System; Family Planning; Family Planning, Behavioral Methods; Female Contraception; Hormones; Male Contraception; Natural Family Planning; Physiology; Technology