Thank you for your question. There is no prescribed way or method or frequency for intercourse. As long as you are both generally fit and healthy and her periods are regular having sex every other day is good enough for an 80%+ chance of pregnancy in the first year and 90% by the second year. You do not need to have any particular position or worry about semen leaking out of the vagina as even one drop contains a million sperm. If you have more concerns or doubts please see a gynaecologist specialising in fertility issues best wishes