Lecture 7 - Reproductive system

Tubal ligation for women the oviduct is cut and ends

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Unformatted text preview: necting the testes with the urethra is cut and sealed to prevent the transport of sperm Surgical methods 2. Tubal ligation (for women) •the oviduct is cut and ends tied off to prevent eggs from reaching the uterus Implantation-suppressing methods 1. Morning-after pill •one type known as RU-486 •interferes with the implantation of the fertilized egg into the uterine wall •blocks the action of progesterone, which leads to the non-synthesis of the proteins necessary to begin and maintain pregnancy •other type known as Plan B •Contains progestin that blocks ovulation, fertilization and implantation Implantation-suppressing methods 2. Intra-uterine device (IUD) •Physically blocks the fertilized egg from implanting Other methods 1. Coitus Interruptus •Requires the man to withdraw his penis from the vagina before ejaculation •Very unreliable 2. Abortion •Deliberate removal of the fetus or embryo before it is ready for birth •Done mechanically (e.g. suction for less than 3 months an...
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