For women with regular menstruation, if the last menstruation is on April 19, the expected date of delivery is January 26 of the following year, while women with irregular menstruation need to be projected under the guidance of a doctor. After a woman of childbearing age is clearly and normally pregnant, her week of pregnancy can be checked by a specialized doctor according to the size of the gestational sac and buds or the length of the head and buttocks indicated by the early ultrasound and the estimated date of delivery can be projected. If menstruation is regular, the estimated date of delivery can also be calculated from the first day of the last menstrual period, with the month subtracted from 3 or added to 9, and the number of days added to 7. Therefore, the estimated date of delivery for the last menstrual period on April 19th will be January 26th of the next year. If your period is usually irregular, you will need to base your estimate on the ultrasound results. Pregnant women in the early stages of pregnancy should pay attention to appropriate rest, avoid strenuous exercise and exertion, prohibit coitus, and follow the doctor’s advice to take folic acid on time until about 12 weeks of pregnancy. From the middle of pregnancy onwards, food rich in protein, calcium and iron, vitamins and other nutrients should be increased or decreased appropriately, such as meat, dairy products, eggs and poultry, vegetables and fruits, etc., in order to meet the growth needs of the mother and fetus.