Ovulation test strips are not always accurate, and they cannot replace thermometers and ultrasound examinations to predict a woman's menstrual cycle and fertility. While ovulation test strips can help women monitor their health, they are not always reliable.

However, not every woman follows a standard cycle, and some may miss or end their menstrual cycle early. This may prevent them from getting pregnant, and using ovulation tests to detect whether an egg is released at the right time is not a reliable method.

In addition, factors such as disease, medications, and environmental factors may affect a woman's menstrual cycle and fertility. These factors should all be taken into consideration in order to choose the best method of pregnancy.

So while using ovulation test strips can help women monitor their health, it's not always accurate. Women should always pay attention to their health and seek the advice of a doctor or other medical professional in order to choose the best method for pregnancy.