If you do an ultrasound to monitor ovulation and find a follicle 16^12mm on top of one ovary, this is a dominant follicle and will probably ovulate within the next 48-72 hours. It is recommended that you have intercourse every other day starting today and come to the hospital 3 days later for a follow-up ultrasound to see if the follicle has been eliminated. This follicle tension is not particularly good, because the diameter is not very equal, 16^12mm is not particularly round, but it does not mean that there is no possibility of pregnancy, so as long as you have intercourse every other day during ovulation, the probability of pregnancy will be very high, at about 60%-70%. It is recommended that you come to the hospital for a blood test for HCG more than 12 days after ovulation to confirm the possibility of pregnancy.