My doc put me on 1 a day after my second MC...He said to take them every day except for when you have your period, they increase the blood flow to the uterus and help thicken the linning of it.. You want to stop for the time you are having your period to help prevent having to heavy of a period from the thinner blood...
I have a close friend that recently lost her baby at 16 weeks and they said the heart stopped beating do to not enough blood flow... The wives tale that everything is ok after the first 12 weeks is strictly that a wives tale. If you start the asprin make sure to talk to your doc about it so he knows you are on it..
My doc told me that once we get a sticky bean we will continue to take the asprin up until at least 36 weeks, so if I do develop a clot from suddenly stopping the asprin at least the baby will be healthy and viable to deliver at that that time.
Good luck ladies !