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list any four methods of contraception used by humans. how does their use have a direct effect on the health and prosperity of the family?

 The various methods employed for birth control are called contraceptive methods.
  • Natural methods (involving behavioural strategy) such as coitus interruptus, lactational amenorrhea , and periodic abstinence
  • Other method include barrier methods, intrauterine devices (IUDs), oral contraceptives and sterilisation method
Use of these contraceptive devices helps in preventing unwanted pregnancies. They can prevent the chances of frequent pregnancies which otherwise affect the health of a mother. They help in family planning by controlling the number of children in a family. So, that  proper  care is provided to the children and that also reduces the chances of poverty.Use of contraceptive devices also reduces the chances of getting sexually transmitted diseases such As AIDS. In this way, the birth control methods play  important roles in  the health and prosperity of the family. 

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mechanical barrier:

this is used by males and females to prevent the entry of sperms into the female tract. this is the only method which protect us from stds.

example:condoms in males and cervical caps in female.

chemical barrier:

this is a method where chemicals are taken orally by females: exampl: oral pills. it brings about hormonal changes in the femaleand prevent ovulation and fertilisation. however it can be disadvantageous since it can lead to hormonal imbalances and side efects.

lntrauterine contraceptive device:

ex:copper T

this method involves the placement of a loop made of copper in the shape of T in the mouth of the uterus. this method prevents the implantation of the embyo in the uterus as the copper ions released creates an unsuitable environment.

surgical method:

ex: vasectomy and tubectomy

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