Homemade Soap Pregnancy Test: How It Works, Result And Accuracy

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Did you know that the bathing soap is used to do a pregnancy test? Although it is one of the inexpensive methods for checking pregnancy, it is not as reliable as a home pregnancy test kit or hospital tests.

In this MomJunction post, we tell you how the homemade pregnancy test with soap is said to work, and if you could rely on it.

Pregnancy Test With Soap: How Is It Done?

To take the test, you need a small piece of soap (some prefer dishwashing liquid), a sample of the day’s first urine, and a sterilized cup (preferably a transparent one to read the reaction).

  • Place a small piece of soap in an empty cup.
  • Collect your urine sample in a separate cup.
  • Pour the urine into the cup containing the soap and wait to see the result.
  • If you notice some chemical reaction in the mixture, it is said to be positive.

How Is The Soap Pregnancy Test Said To Work?

It is believed that the soap pregnancy test or any homemade test reacts to the hCG hormone in the urine sample. Soap is likely to react with hCG and produce foam or bubbles. Some  proponents of the test say that a blue soap would turn to green when it reacts with hCG. This process could, therefore, probably help in identifying whether you are pregnant or not.

How Accurate Is A Homemade Pregnancy Test With Soap?

The soap test is not accurate. A foaming soap might anyway turn frothy when you add something to it. And, therefore, it can show a similar result even when a non-pregnant individual tries it. While you may still try this test, you should back it up with a pregnancy test kit or see a healthcare provider for a blood or urine test to confirm the result.

When Is The Soap Pregnancy Test Taken?

If you like to give it a try, do it a week after you miss your period. Take it in the morning with the first urine sample of the day when the hCG hormone content is high in it (1).

How To Read Soap Pregnancy Test Results?

It is believed that leaving the solution untouched for around ten minutes could give the results.

  • It is said to be positive if the mixture bubbles up, and/ or a blue color soap turns green.
  • It is said to be negative if there is no such reaction.

When To See A Doctor?

If you have missed your period or had unprotected sex, you may check for early pregnancy symptoms by consulting a doctor. The symptoms may include missing your period, morning sickness, constipation, bloating, abdominal cramps, fatigue, and breast tenderness (2).

The soap pregnancy test is simple and easy to perform. But it is not accurate, and medical experts do not recommend it. You may try it for fun, but back it up with a home pregnancy test kit or clinical pregnancy tests (by checking with your doctor).

Did you try soap pregnancy test? Let us know your experience with it, in the comments section.


MomJunction's articles are written after analyzing the research works of expert authors and institutions. Our references consist of resources established by authorities in their respective fields. You can learn more about the authenticity of the information we present in our editorial policy.
1. HCG in urine; U.S. Department of Health and Human Services National Institutes of Health (2010)
2. Pregnancy: Signs, Symptoms and Health; Regis College


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Rebecca Malachi

Rebecca is a pregnancy writer and editor with a passion for delivering research-based and engaging content in areas of fertility, pregnancy, birth, and post-pregnancy. She has been into health and wellness writing since 2010. She received her graduate degree in Biotechnology and Genetics from Loyola Academy, Osmania University and obtained a certification in ‘Nutrition and Lifestyle in Pregnancy’ from Ludwig... more