Women in the first week of pregnancy usually do not feel specific symptoms, and if they do, they are not obvious. Generally, during the first week of pregnancy, there are no specific symptoms because of the short duration of the pregnancy. This is because early pregnancy reactions, such as nausea and vomiting and indigestion, do not occur until about 40 days into the pregnancy. If a woman is actively preparing for pregnancy, she will often use early pregnancy test paper to determine whether she is pregnant or not. If she gets a positive result, she may experience a slight pain in her tummy or a feeling of swelling in her breasts due to psychological reasons, but this feeling is more from psychological excitement, nervousness, etc., rather than a normal early pregnancy reaction. Most women do not realize that they are pregnant when they are one week pregnant and have no symptoms. This is because usually when you are one week pregnant, you have not yet reached your original menstrual period, so you do not feel menopause or delayed menstruation. You can’t use whether there is early pregnancy reaction to judge whether you are pregnant or not, if you have any doubt you can use early pregnancy test paper to test, and then go to the hospital for further testing of various indicators, so as to determine whether you are pregnant or not. So the first week of pregnancy is not obvious early pregnancy reaction, because the time is too short, you can use early pregnancy test paper test, or go to the hospital to test HCG (human chorionic gonadotropin) to determine whether pregnancy.