hi day14 is the most spoke about day for ovulation and depending where you read on all lengths of cycles so if you work from day 1 you need to have unprotected sex around day 9 or 10 this gives sperm time to get in place which takes 3 days and then can live for 5 to 10 days also depending were you read take into account day 14 its give or take a day so perhaps if its a day or two after then his sperm is sitting there just waiting for action. but as long as your now pregnant unless you need to work out who the father is? can you work it out from what's above and you would need to know what days you had unprotected sex on these are the most important days any sex before day 14 is where you need to be looking. hope this helps you. good luck
regarding an ultrasound what is the 0 day? the date that the egg was released or fertilized by the sperm? . i've received two different due dates during the earlier part of my pregnancy. per the ovluation calendar my last menstrual cycle was 32days from the previous cycle. first i was told i was "x" amount of weeks and 0 days and i was told i was "x" amount of weeks and 4 days? i'm trying to figure out on what day i possibly conceived?