No luck here should mean no successful fertilization. A drop in temperature 13 days after ovulation does not mean that there is no pregnancy, and you cannot judge whether or not you have conceived simply by your temperature. For women who are preparing for pregnancy, you can usually increase the number of times you have intercourse during the ovulation period, which can improve the chances of conception. A drop in temperature 13 days after ovulation does not completely rule out the possibility of non-pregnancy. However, it should be noted that the simple temperature status can not determine whether the patient is pregnant or not, want to clarify whether the pregnancy, should cooperate with the doctor for blood, urine and ultrasound examination, can be diagnosed through the human chorionic gonadotropin level, which is a more accurate method of checking the pregnancy. It is recommended that women should relax, do not be overly anxious and nervous, and let nature take its course.