The gestation period is about 280 days and 40 weeks from the first day of the last menstruation. Generally divided into three periods, early pregnancy refers to before 14 weeks of gestation, 14-27 weeks is called mid-term pregnancy, after 28 weeks is called late pregnancy, so early pregnancy in clinical terms mostly refers to early pregnancy, pregnant women often appear the following symptoms: 1, menopause: under normal circumstances, the menstrual cycle is about 21-35 days, the average of about 28 days. With a history of sexual life, while more than 10 days beyond the normal menstrual cycle without menstruation, can be considered the possibility of pregnancy; 2, fertilized egg implantation bleeding: about 8 days after ovulation and implantation, most people have no obvious feeling, but some pregnant women will implantation bleeding, the color of bleeding is usually pink or brown, sensitive people will also have soreness, but the general symptoms are relatively mild, pregnant women do not need to worry too much 3, increased leucorrhea: after pregnancy, due to changes in the level of estrogen and progesterone, the cervical glands and vaginal mucous membrane secretion increases, resulting in increased leucorrhea; 4, early pregnancy reaction: usually appears in about 6 weeks of menopause, manifested as cold, dizziness, weakness, drowsiness, lack of appetite, nausea, morning vomiting and other symptoms. Some pregnant women also have emotional changes, such as irritability, depression, irritability, sensuality, etc., which mostly disappear around 12 weeks after menopause. There may also be changes such as enlarged nipples and obvious pigmentation on the nipples and areolas. In addition, around the areola may appear cortical hyperplasia of dark brown nodules, also known as Montserrat’s nodules; 6, frequent urination: because pregnancy will cause the uterus to increase in size, become soft, spherical and other manifestations, and the increased uterus in the pelvic cavity will compress the bladder, causing pregnant women to urinate frequently, when the uterus increases beyond the pelvic cavity in the 12th week of pregnancy, frequent urination can disappear on its own; 7, other symptoms: some pregnant women can appear increased estrogen, manifested as spider nevus, skin pigmentation, etc. Some pregnant women may also experience uterine contractions, discomfort, bloating, constipation and other symptoms, but under normal circumstances, uterine bleeding will not occur.