Worksheet: Contraception

In this worksheet, we will practice explaining how hormones are used in contraception, and evaluating the effectiveness of hormonal and non-hormonal methods of contraception.

Q1:

The rhythm method involves abstaining from sexual intercourse around the days a female ovulates.

Why is this not an effective method of contraception?

  • AThe longer the period of abstaining from sex, the higher the chance of future pregnancies.
  • BA female is less likely to become pregnant around ovulation days.
  • CIt relies on the menstrual cycle being perfectly regular to ensure predictions about ovulation are accurate.
  • DIt is not possible to predict when a female will ovulate.
  • EThis statement is incorrect; the rhythm method is highly effective.

Q2:

1,500 women use condoms as their only form of contraception. In a year, 32 have unexpected pregnancies. How effective are condoms? Give your answer in a percentage to the nearest whole number.

  • A10%
  • B2%
  • C98%
  • D32%

Q3:

A contraception method is 95% effective. If 1,000 women use it, how many will be expected to get pregnant over the course of a year?

Q4:

What is the main aim of contraception?

  • ATo prevent the transfer of STDs
  • BTo promote fertilization and pregnancy
  • CTo prevent pregnancy
  • DTo prevent sexual intercourse

Q5:

Methods of contraception can be classified as hormonal or barrier based on how they prevent pregnancy. For each description, state what class of contraception is being described.

A condom worn over the penis during intercourse

  • ABarrier contraception
  • BHormonal contraception

The combined pill that is taken by a female to alter her menstrual cycle

  • ABarrier contraception
  • BHormonal contraception

A diaphragm that is placed over a female’s cervix to prevent sperm from reaching the egg

  • AHormonal contraception
  • BBarrier contraception

Q6:

1,500 women take the combined contraceptive pill. 7 of them have unexpected pregnancies.

How effective is the pill? Give your answer as a percentage to one decimal place.

  • A99.5%
  • B0.5%
  • C90.5%
  • D70.0%

Q7:

1,500 women use a diaphragm as their only form of contraception. This diaphragm is 94% effective at preventing pregnancies, if used perfectly. How many unexpected pregnancies may occur?

Q8:

Which of the following methods of contraception also protects against the transmission of most STIs?

  • AImplants
  • BContraceptive pills
  • CWithdrawal methods
  • DCondoms
  • EInjections

Q9:

The table provided shows data on the effectiveness of different contraceptives, when used correctly, as stated by the NHS (2018).

MethodMale condomIntrauterine device (IUD)Combined pillDiaphragm
Effectiveness (%)98>99>9992

Which of the following statements is correct about the data?

  • AThe effectiveness of a condom in preventing pregnancies is greater than the combined pill.
  • BThe effectiveness of an IUD in preventing pregnancies is equal to a diaphragm.
  • CThe effectiveness of a diaphragm in preventing pregnancies is less than the combined pill.
  • DThe effectiveness of a diaphragm in preventing pregnancies is greater than a condom.

According to the data, which is the least effective method of contraception?

  • AUsing an IUD
  • BUsing a condom
  • CUsing a diaphragm
  • DTaking the combined pill

What is the most likely reason the percentage of effectiveness shown in the table is not representative of real-life data?

  • AThe effectiveness of barrier contraception changes depending on the days of the female’s menstrual cycle.
  • BMost people do not use these methods 100% correctly.
  • CThe data was not obtained through accurate methods.
  • DThe effectiveness of hormonal contraception decreases around the time a female ovulates.

Q10:

1,500 women use an IUD as their form of contraception. 5 have unexpected pregnancies. How effective is an IUD? Give your answer as a percentage to one decimal place.

  • A95.0%
  • B99.6%
  • C0.3%
  • D99.7%

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