If the menstrual cycle is regular, pregnancy can be detected with a pregnancy test 10 days after menstruation is delayed. If menstruation is irregular, pregnancy may not necessarily be detected 10 days after menstruation is delayed. If the menstrual cycle is regular and you have sex, you can detect pregnancy with a pregnancy test stick 10 days after the menstrual period is delayed, which is mainly related to the increase of hormone levels in the body. At the same time, it can be accompanied by nausea, vomiting, fatigue, drowsiness, loss of appetite and other uncomfortable symptoms, you can promptly consult the doctor, do human chorionic gonadotropin (HCG), ultrasound diagnosis. If irregular menstruation women, menstruation for more than ten days may not be able to detect pregnancy, dynamic observation is required. In early pregnancy, it is necessary to pay attention to rest, supplement folic acid, take outdoor walks appropriately, have small and frequent meals, and reasonably match the diet. Fasting and insufficient diet should be avoided so as not to cause hypoglycemia, which will affect the health of the mother and fetus.