A one-day delay in menstrual period 14 days after intercourse, with pink discharge and brown color, is not necessarily pregnancy, but may also be menstruation. Periods are menstruation, women of childbearing age may be pregnant when their period is delayed by one day 14 days after intercourse, and there is pink and brown vaginal discharge, but it may also be menstruation. You can go to the hospital for a blood HCG (human chorionic gonadotropin) test and ultrasound, etc., which will help diagnose whether you’re pregnant or menstruating, and will also help you learn about the lining of the uterus and the uterine cavity. Women who are preparing for pregnancy can increase their chances of conception by having intercourse at the time of ovulation under the guidance of their doctor. Since the fertilized egg can secrete HCG about 1 day after its implantation, blood HCG levels can be monitored about 10 days after intercourse to determine whether pregnancy is occurring, and ultrasonography can also be performed when the menstrual cycle exceeds 1 week or so to make a definitive diagnosis of pregnancy. If your period is delayed by one day 14 days after intercourse, and you have pink discharge and brown color, you can go to the hospital to find out the cause.