Health A-Z

Health A-Z

For information on a particular condition or topic try our Health A-Z with links to this and other Jean Hailes websites or use the website search function.

Health Tips

Challenging the myths around dieting and weight from our Health for Women website

A few simple lifestyle changes can prevent kilo creep, without dieting. Learn more...

Around Jean Hailes

Home Resources My Health Tools Medical Research

Understanding Medical Research

What is medical research?

Medical research studies help us to obtain information on health or disease, to learn how our bodies work, why we become ill, and what we can do to become and stay healthy.

What are the different types of medical research?

There are several types of medical research. Some studies aim to learn what causes a disease or condition, how to prevent or avoid getting sick, and how to diagnose and screen for various diseases, while others aim to improve or develop new treatments. Specific types of studies include:

Experimental studies

These are tests of a treatment, preventive intervention or diagnostic technique. A treatment or intervention is applied to one group of people, who are then compared to another (‘control’) group that did not receive the treatment/intervention.

Observational and Epidemiological studies

These investigate patterns of diseases in groups of people. They often follow the same people over a period of time to observe what happens to their health. For example, one could compare rates of lung cancer development in people who smoke with those in people who do not smoke.

Observational and epidemiological studies cannot prove causes of illness or support specific treatments. However, they can make suggestions about possible behaviour, exposures and health experiences that might be responsible for a disease or condition and potential treatments that then need further intervention studies.

Clinical trials or intervention studies

These aim to learn the best ways in which to treat or prevent disease. A prevention study may test a lifestyle change such as regular exercise and improving diet quality. The length of clinical trials will vary from trial to trial, as will the time commitment. The best clinical trials are ‘randomised’, that is participants are assigned to one or another treatment, or to a placebo (dummy) treatment, by chance.

Clinical trials involving a new drug, vaccine or device

Clinical trials are often completed in stages, called ‘phases’. If you are thinking about volunteering for a clinical trial involving a new drug, vaccine or device, you should know which stage of testing the drug or device is in:

  • Phase I aims to determine the best dosage to be used in further testing, and to measure how quickly the drug is broken down in the body.
  • Phase II aims to find out if the treatment has the desired effect in people, to confirm the best dosage to be used in further testing, and to confirm testing for safety.
  • Phase III aims to measure how well the treatment works and to determine how much of a drug is needed to achieve the best result.
  • Phase IV begins after the results of Phase I-III trials have been given to the government for approval. These trials are done for many reasons – To test different dosages, to determine if the treatment works for other diseases or conditions, or to test different ways of taking the treatment (e.g. tablets, syrups).

Why are women needed for medical research studies?

For many years, researchers didn’t include women in medical research studies. They just assumed that if a treatment worked for men, it would work the same way for women. Now we know that women and men can respond differently to the same treatment, and that some treatments that work for men may not work as well for women and vice versa. In addition, there are many diseases and conditions that only affect women, such as cancer of the uterus or ovaries, pregnancy and menopause.

Who can participate in medical research?

Nearly every woman can qualify to be part of a medical research study at some time in her life. However, each study has a specific set of criteria that participants must meet in order to be involved. Even perfectly healthy people may participate in observational studies and Phase I clinical trials. If you are currently healthy but are at risk of a disease, you may qualify for a prevention study. And if you get sick, you may want to consider entering a clinical trial to test a treatment.

Ethics approval

All studies involving animals or humans must be approved by an intensive ethics approval process, where the study is reviewed by a panel of scientists, doctors, lawyers, community representatives and religious leaders. Once a study is approved by an ethics committee it is deemed to be an important study where harm to participants is minimised and the potential benefits to human health are valuable.

What will I be told about the study?

All participants in medical research volunteer to participate by choice. Researchers use a process called informed consent to make sure that volunteers understand what will happen during and after the research study, prior to agreeing to participate in the study.

During the informed consent process you should learn the following:

  • The purpose of the research
  • What you will be expected to do, and when
  • What the treatment or intervention is (if any)
  • If a clinical trial, whether there is a chance that you will receive a placebo (inactive treatment)
  • The chances of being harmed (risks) and chances of being helped (benefits)
  • What alternative treatments are available (if any)
  • Any costs to you or your health insurance company for taking part in the study
  • Who will have access to your medical and personal information (confidentiality protocol)
  • Who is responsible for paying for treatment if you are injured as a result of being in the study
  • Who is paying for the study
  • Whether you will be paid or compensated for taking part in the study
  • The length of the study
  • Who to contact if you have any questions

Note: if you change your mind about being involved in a study, you are not obliged to participate and can withdraw at any time.

What are the risks of participating in medical research?

This depends on the type of study. Some studies involve little or no risk, while others may be risky. Most studies are somewhere in between. However, participants should always be informed about any foreseeable risks, side effects or discomfort, prior to participating in medical research projects. There are two risks that are particularly important for women:


When a woman is pregnant, any drugs that she takes may have an effect on her foetus. Because the risks of new drugs and other treatments to the foetus are not always known, women who are pregnant or who may become pregnant must take these risks into consideration.

Birth control pills and hormone replacement therapy (HRT)

Can affect how your body handles drugs. It is important to discuss any hormones or other medications you are taking, including 'bioidentical' hormones, herbs and dietary supplements.

How will the research study benefit me?

Volunteering for medical research is very important as it helps to develop new treatments for diseases, assess current treatments and potentially help prevent diseases. Participants will be helping to improve the future health of others. It is important to understand that participation in medical research is not the same as getting medical care. If you have an illness or condition that requires medical care, you should seek that care from a physician or other accredited healthcare provider.

Further resources

National Health and Medical Research Council statement on ethical conduct in human research (updated September 2009): 1MB

Content Updated 22 September 2011

New Look Jean Hailes for Women's Health Coming Soon

Follow us

Stay in touch

Free email updates

Stay in touch

Research studies

Would you like to participate in a study?

Learn more here


Health information
“Thank you for such easy to read and reliable information.”
Carmel, Abbotsford, VIC

This website is certified by Health On the Net Foundation. Click to verify. healthinsite Better Health Channel
Get Adobe Reader Get Adobe Flash Player
This site complies with the HONcode standard for trustworthy health information: verify here. Jean Hailes for Women's Health
is a healthinsite Partner
Jean Hailes for Women's Health 
is a Better Health Channel Partner
Downloadable information may require
Adobe Reader or Adobe Flash Player
© Copyright 2014 Jean Hailes for Women's Health