The table shows the average pregnancy rates amongst couples using different methods of contraception.
Contraception method
Average number of pregnancies per 1000 couples per year
Condom
55
Contraceptive pill
4
Rhythm method
125
Spermicide
80
Which type of contraception is the least reliable?

Chemical

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Hormonal

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Mechanical

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Spermicide

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Solution

The correct option is D
Spermicide

The correct option is D:
Spermicide is sperm-destroying contraception that is inserted vaginally before contact to prevent pregnancy.
The natural method includes the rhythm method, which is the least accurate in the given table.
For example, monitoring a woman's menstrual cycle, measuring basal body temperature, and keeping an eye out for changes in cervical mucus.

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Contraception method	Average number of pregnancies per 1000 couples per year
Condom	55
Contraceptive pill	4
Rhythm method	125
Spermicide	80

The table shows the average pregnancy rates amongst couples using different methods of contraception.Contraception methodAverage number of pregnancies per 1000 couples per yearCondom 55Contraceptive pill4Rhythm method125Spermicide80Which type of contraception is the least reliable?

The table shows the average pregnancy rates amongst couples using different methods of contraception.
Contraception method
Average number of pregnancies per 1000 couples per year
Condom
55
Contraceptive pill
4
Rhythm method
125
Spermicide
80
Which type of contraception is the least reliable?