In a 75-day pregnancy, the fetus is 4.0 to 6.0 cm in length. At 75 days of pregnancy, which is equivalent to 10 weeks + 5 days of pregnancy, a relatively complete fetus can be seen in the uterine cavity during ultrasound. At this time, the uterus has not yet exited the pelvis and no abdominal enlargement can be seen, but the fetus continues to grow in the uterus and is about 4.0~6.0cm in length and weighs 12~15g. Early pregnancy reaction will slowly disappear on the 75th day of pregnancy, and you need to eat more nutritious food as appropriate, and you also need to continue to take folic acid supplements until 12 weeks or more. If there is no abnormality on the 75th day of pregnancy, you can wait for about 90 days to go for NT examination, build up a file, and do all the blood and urine tests. Pregnant women with any discomfort during pregnancy need to go to the hospital in a timely manner, by the doctor according to the specific circumstances, to formulate individualized diagnosis and treatment plan, so as not to delay treatment.