Wednesday, October 14, 2009
okay guys:) kheng shyan here.im back to posting cause this pathetic class blog is going to be dead.anyways tmr is your science paper,and i can see clearly that many people are studying expect ME:( hahas nothing to memorise one lor to be exact.okay im not sure.anyways im just gonna type the birth control methods for fun:) and please hor.DONT say i pervertic okay? this is just what we are HEAVILY tested on okay?! (ARTIFICIAL)Birth control methods:classified in three ways1.) To prevent fertillisation2.) To prevent ovulation3.) To prevent the embryo from being implanted.*Prevention of Fertilisation-Spermicide- Chemicals that inactivate or kill the sperm
- Block sperms from entering the uterus (killing it)
- May be in the form of gel or foaming tablets
- Not reliable when used on own
-Condoms
- Thin rubber tube that is used to cover the erect penis before sexual intercourse
- Small teat at the end which collects the semen
- Acts as a barrier between the sperm and the ovum--impermeable to sperm
-Diaphragms
- Dome-shaped rubber cap with an elastic rim
- Inserted into the vagina
- Placed over the cervix
- Impermeable and prevents sperm from entering the uterus
- More effective if used together with an spermicide
*Implantation
-Intra-uterine devices
- Coil or loop of plastic/metal that is inserted into the uterus by the doctor
- Prevents the embryo from being implanted in the uterus lining
*Prevent ovulation
-Contraceptive Pills
- Contain female sex hormones like progesterone
- Taken orally under a doctor's prescription
- Method is reliable provided women follow instructions closely.
Labels: key points for b.c.m