If you have intercourse during ovulation and fertilization is successful, you may be able to detect pregnancy using a pregnancy test; if not, you generally can’t detect it. If a woman has intercourse during ovulation, the egg and sperm will combine, and will usually implant in the bed in about 1 week, and the female body will secrete a large amount of estrogen and progesterone, and the level of HCG in the urine at this time will also increase, and the use of early pregnancy test paper may be able to detect the pregnancy. Sperm survival time is up to 5 days, if the woman is not in the ovulation period, or a long time from the ovulation period, sperm and egg is difficult to combine, the woman may not be pregnant, at this time, the early pregnancy test paper usually can not detect pregnancy. It is recommended that women use early pregnancy test paper, pay attention to the best use of morning urine, according to the instructions for operation, if the detection of pregnancy, it is recommended to timely consult a doctor, under the guidance of the doctor to improve the relevant examination, to further clarify whether the pregnancy.