| Diaphragm | Condom | Methods to avoid sex |
| They are plastic hoods that are inserted in the vagina and they are placed covering the uterine neck, forming a mechanical barrier to the arrival of the sperm to the uterus. | The preservative is the one that is used to contain the penis before the sex acting like mechanical barrier for the sperm and the infections. | Of the basal temperature, Ogino, interrupted, Billings |
| Rubber or plastic usually is innocuous, unless an allergy to the material exists of which facts estan, (, silicones) | They are innocuous, but they can give less pleasure to the pair, must be placed when already there is erection so that they are not broken, but always before the penetration. | All prevent the relations in determined days of the cycle, this limitation can be very restrictive and difficult to maintain, generating tension and conflict. |
| It can place the own woman after a doctor teaches to him to do it, requires to be accompanied by spermicidal creams. | It is without a doubt the spread method more and you promote in the world, mainly after the appearance of AIDS. For it it must be of Latex. | The temperature or the vaginal flow is due to control by far well-taken care of, according to which method is used. |
| They consider condón feminine, do not prevent the venereal infections. | It must be used with attention to avoid failures and breakage | It is not easy to use it in febrile diseases or with very desparejos cycles. |
| Fault 1 of 8 women to the year. | Fault 1 of 8 women to the year | Fault 1 of 4 women to the year |
The main contraceptive methods are the vasectomy, the pill, the intrauterine device, the diaphragm, the DIU, Condon and the Ogino method.
Coitus interruptus (retirement of the penis before the ejaculation) also practices, but he is not safe and usually it causes great tensions, physical and emotional.
The spermicidal creams, the frothy tablets and the aerosols, used single, are little effective
The same happens with the vaginal shower, with which it is tried to drag by washing the sperm.
The belief before very spread is false, of which a woman cannot conceive in the lactation.
The prostaglandins, substances of hormonal type today in study, could be used to induce the menstruation in an embarrassed woman, but such contraceptive method could be considered as a form to abort.
The sterilization of the women, cutting and binding the tubes of Fallopian tube, is effective but often it is irreversible.
| Vasectomy | Pill | D.I.U. |
| The conduits that take the sperm of the testicles to the penis are sectioned and sutures. It does not prevent to be able to make the sex with normality. | Seizure every day in all the menstrual cycle, the pill inhibits the ovulation and makes difficult to the entrance to the sperm, doing hostile vaginal means, closes the uterine neck. | The action mechanism has not been determined very either, inhibits the implantation of the egg, or possibly affects the spermatozoon. |
| Noncause generally psychological problems. Physically, it is not a difficult operation, but its reversibility is not guaranteed. | It can appear migraine, depression, losses in the cycle, increase of weight, nauseas, and risk of thrombosis.
To choose those of last generation to have less drugs. |
Very abundant rules can appear that make the retirement necessary of the DIU. The injurious effects but are the irritation of the endometrium. |
| A surgeon will advise it, is not normal to remain in the hospital | They must be indicated by the gynecologist, and to make controls periodic | It must place the gynecologist and to revisal it periodically, some have a thread to verify that this located good. The best ones are of copper and have varied forms. |
| Tests are due to make, after months for the sperm count. | It has a risk under pregnancy very taking them according to the instructions | If it is displaced inadvertently, allows the pregnancy. |
| Fault 1 of each 30000 | Fault 1 of 300 women to the year | Fault 1 of 20 women to the year |
The world-wide population reached the 1,000 million inhabitants in 1850.
And in 1976, had to a great extent to the abrupt reduction of the rate of mortality, it exceeded or the number of 4,000 million, arriving already, some time ago, to exceed 6,000 million.
The statistics show that, in the countries developing (in Africa, Asia and in zones of Latin America and the Australian Continent), the nativity index is far beyond the one of the industrialized countries (Europe, North America, Japan, Russia, New Zealand, Australia and the tempered South America).
This elevated tax of nativity, combined with a reduction of the number of deaths by one better medical well-taken care of nutrition and month, has done that tax annual of increase of the population is today much greater in the countries with hardships to obtain aliment’s suitable social services.
The purpose of the control of the population is to reduce to that deficiency resources, allowing a greater well-being.
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