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It would be very unlikely to get pregnant 7 or 11 days after a miscarriage. Once normal cycling resumes, it takes a couple weeks for a follicle to develop to the point that an egg is released, which is called ovulation. It also usually takes some time for a woman to start normal cycling. While it is theoretically possible that a woman can get pregnant as soon as 2 weeks after a miscarriage, it usually would take longer.
Since sperm can survive in the female genital tract for up to 5 days, it is possible that a sexual encounter 11 days after a miscarriage could cause a pregnancy if ovulation were to occur 14 days after the miscarriage. But since it is unlikely that ovulation could occur that soon, it would be unlikely that pregnancy could result from a sexual encounter 11 days after the miscarriage.
The ongoing bleeding also would make pregnancy less likely. When ther eis ongoing bleeding, the lining of the uterus is not amenable to implantation.
So, it would be very unlikely that you could have gotten pregnant from either of these encounters.
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