The increase in estrogen and progesterone levels during pregnancy can increase the secretion of the cervical glands and cause an increase in leucorrhea, which is a normal physiological phenomenon. In addition, before and after menstruation, the pelvic congestion increases the secretion of vaginal mucosa and cervical glands, which may also cause increased leucorrhea. Vaginitis can also cause increased secretion due to inflammatory stimulation, such as bacterial vaginitis, with grayish white leucorrhea and increased secretion, accompanied by vulvar itching; trichomonas vaginitis, with yellowish-green purulent foamy leucorrhea, high volume and fishy odor; and increased bean curd-like leucorrhea suggesting mycosis fungoides. Therefore, leucorrhea can increase during pregnancy, but it is not a specific manifestation, and you cannot rely on the increase of leucorrhea alone to indicate whether you are pregnant or not. If you have sexual intercourse, if your period is delayed for more than 10 days, if you feel dizzy, nauseous, vomiting and weak, you need to confirm whether you are pregnant or not, you can use early pregnancy test paper. Regardless of the cause of the increased leucorrhea, you need to regularly wash your vulva to prevent infection, wear less tight pants, pay attention to the regular work and rest, reasonable diet, and enhance the immunity of the body.