Hi, Thank you for posting your question here, I will try to answer it to the best of my abilities. You should try having intercourse on the days you are ovulating, that way is far more effective. This is how you calculate the days when you re ovulating- Count 14 days from your last period, the next 4 days after that are the days when you ovulate, so try to have intercourse on those days. If that doesnt work, you want to have your boyfriend s semen checked to see what his sperm count is. You can also have some tests done, for example an ultrasound, to see if there is anything wrong with your uterus. I hope this answered your question.