Does freshest sperm always win out over older sperm?

Does freshest sperm always win out over older sperm for timing? doctor said I conceived nov 7 even though I had my period nov 1 and 2nd. I had sex 4 times with my ex on nov 4 and then had asex with my boyfriend probably nov 6 and 7 and all the time after those dates. just curious if my ex could be my babys father. my due date is july 31st as well

If you clarify it with your doctor, I suspect he/she will tell you that dates of conception are more of an estimate than something that can be calculated exactly. When the possible dates of conception are three days apart, that's a flip of a coin. The only way to know the father for sure is a DNA test.

both are possible, talk to doctors about possible side effects BEFORE confirming a prenatal dna testing - and you'll have to get a permission from one of your boyfriends if you want it.
you'll probably see who the father is when the baby is born, because you can calculate it from the blood type and other obvious factors.