Methods and steps on how to confirm pregnancy with twins through self-test Pregnancy is a very important and anticipated event for every woman, and the pregnancy of twins fills the family with joy and surprises. Although you can now determine whether you are pregnant with twins through hospital examinations, if you want to confirm it from your own body, there are some methods. Next, we will explain in detail the methods and steps on how to confirm pregnancy with twins through self-test. The first step is to measure basal body temperature. Basal body temperature refers to the body temperature without any interference. Generally, before getting up in the morning, precautions include: do not drink water.