<s>[INST] my wife had under gone a follicular study and as my doctors suggestion after the follicle acquires 19mm and on the 17 th day an lupride injection was given and on the 18 th day as we went to a scan it is informed that there is an evidence of ovulation ,and after the 19 and 20th day there was intercourse can it be possible for pregnancy please explain [/INST] very rarechnces of getting pregnant when u had intercourse after 2 days of ovulation.best chances r when u go for intercourse  for 2-3 days till ovulation , because in that period vaginal secretions are least viscous & sperms can travel to ova easily </s>