RESUMO
Some important new birth control methods have been developed in the postpill, post-IUD era; others are on the way. But shrinking dollars in research (especially R&D), inadequate coordination and planning by donors and programs, and costly and complex regulatory requirements frustrate efforts to use current knowledge to make major breakthroughs.
Assuntos
Anticoncepcionais , Dispositivos Anticoncepcionais , Esterilização Tubária/tendências , Feminino , Humanos , Dispositivos Intrauterinos , Masculino , Indutores da Menstruação , VacinasAssuntos
Anticoncepcionais Masculinos , Congêneres da Progesterona , Congêneres da Testosterona , Peso Corporal , Anticoncepcionais Masculinos/efeitos adversos , Feminino , Ginecomastia/etiologia , Humanos , Masculino , Congêneres da Progesterona/efeitos adversos , Disfunções Sexuais Fisiológicas/etiologia , Espermatogênese , Testosterona/efeitos adversos , Testosterona/análogos & derivados , Congêneres da Testosterona/efeitos adversosRESUMO
PIP: Research is in progress to develop new methods of fertility control. At least 9 basically new methods for interfering with fertility are now being tested clinically. The number runs to 15 if variations in dosage and modes of delivery are counted. There are 4 areas to attack for male fertility control: sperm formation, sperm maturation, sperm transport, and seminal fluid biochemistry. There are 9 similar processes in the female: ovulation, ovum transport, sperm tran sport, fertilization, zygote transport and development to the blastocyst stage, preparation for nidation, nidation, placentation, and maintenance of pregnancy. All the current research is described.^ieng