Explain any three contraceptive devices that can be used by women for

1.	Explain any three contraceptive devices that can be used by women for their family planning.
Answer» The following are the three contraceptive devices that can be used by women for family planning : (i) Barrier methods : This includes condom for females that covers the vagina and cervix. (ii) Intrauterine devices : (IUDS) : These are inserted by docters or expert nurses in the uterus or vagina. For example : Lippes loop, cut and multilood 375. (iii) Pills : These include progestogen pills or progestogen-estrogen combination pills.

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(i) Arrange the following compounds in an increasing order of basic strength : `C_(6)H_(5)NH_(2), C_(6)H_(5)N(CN_(3))_(2), (C_(2)H_(5))_(2)NH and CH_(3)NH_(2)` (ii) Arrange the following compounds in a decreasing order of `pK_(b)` values: `C_(2)H_(5)NH_(2), C_(6)H_(5)NHCH_(3), (C_(2)H_(5))_(2) NH and C_(6)H_(5)NH_(2)`
Rerrange the following in an increasing order of their basic strengths: `C_(6)H_(5)NH_(2),C_(6)H_(5)N(CH_(3))_(2),(C_(6)H_(5))_(2)` NH and `CH_(3)NH_(2)`.
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Explain any three contraceptive devices that can be used by women for their family planning.

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