Contraceptive, is a method that prevents or reduces the chances of fertilization or pregnancy during sexual intercourse. 

Physical methodsBarrier methods: prevents the pass of sperm to the uterus.

Types: CondomFemale condomCervical cap Diaphragm

Condom is placed on a boy's penis when it becomes erect .

It´s like male condom but is introduced in the vagina.

Is another type of barrier contraception that is introduce in the vagina.

This is a barrier that blocks the sperm from entering to the uterus.

Is a type of birth control with a spring molded into the rim. The spring creates a seal against the walls of the vagina.

Hormonal methods

Types:  

Contraceptive pill  Contraceptive vaginal

ring

The Pill is a tablet containing two female hormones. One pill is taken every day. The first 21 pills have a combination of synthetic estrogen and progesterone hormones. The Pill stops ovulation, preventing the ovaries from releasing eggs, making it harder for sperm to enter the uterus. The hormones in the Pill prevent fertilization. The last 7 pills of a 28-day pack have no hormones and are called spacer pills.

Yes. But very occasionally, it can have serious side-effects. However, recent news about Pill safety has been remarkably good. The Pill is 92-99.7% effective as birth control. It does not protect against reproductive tract infections, including HIV/AIDS.

Virions of HIV-1 assembled in the surface of a lymphocyte.

Fertilisation is the fusion of gametes to produce a new organism. The process involves a sperm fusing with an ovum, which develops an embryo.

The process can occur within the body of the female (internal fertilization) or outside in the case (external fertilization).

The entire process of development of new individuals is called procreation.

In vitro fertilization eggs are gathered from the woman's ovaries and mixed with the man's sperm in the laboratory.

Is the major treatment in infertility when other methods have failed. The process involves hormonally controlling the ovulatory process, removing eggs from the woman's ovaries. Is then transferred to the patient's uterus.

http://kidshealth.org/teen/sexual_health/ http://en.wikipedia.org/wiki/Birth_control http://es.wikipedia.org/wiki/Método_anticonceptivo http://mundopolitica.foroactivo.com/rea-de-debate-f4/la-iglesia-a-favor-de-

los-anticonceptivos-t2828.htm http://en.wikipedia.org/wiki/Hormonal_contraception http://kidshealth.org/teen/sexual_health/contraception/

contraception_condom.html# http://en.wikipedia.org/wiki/Diaphragm_(contraceptive) http://es.wikipedia.org/wiki/SIDA http://www.netdoctor.co.uk/sex_relationships/facts/contraceptivepills.htm http://en.wikipedia.org/wiki/Fertilisation#Parthenogenesis http://www.babycentre.co.uk/preconception/fertilitytreatments/ivf/