No, it is not possible. 11 days after conception is 3 weeks 4 days from the first day of the last menses, which is how pregnancy is measured. Even at three weeks four days is not possible to see much of anything by ultrasound. It would take another one and a half to 2 1/2 weeks to see any indication of pregnancy. You may not yet see an embryo. That would be closer to four or 4 1/2 weeks more.

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Brief Answer: At five weeks and zero days of pregnancy the embryo is 2 mm in size, smaller than Detailed Answer: Hi, At five weeks and zero days of pregnancy on ultrasound one might be able to pick up the yolk sac. especially if done through the vagina. The embryo won't be visible until the end of the fifth week when a tiny heart beat might be detectable. 2 mm is smaller than the size of a sesame seed is about the right size for five weeks and it should double in size by the end of the week. Regards,

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Brief Answer: No. Ovulation is midcycle Detailed Answer: Ovulation is around d14 in a 28 day cycle. Sperm lives three days. d1 is the first day of of the last period. Conceptios is possible day 11-17, most likely day 12-13-14.

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Brief Answer: You may need paternity test after delivery Detailed Answer: Hi, When a person has 35 day cycle-conception is still most likely to occur approximately 2 weeks back from the expected day of the next cycle. ovulation to menses is much more consistent than the first part of the cycle. So if the first day of the last menstrual period was 6/18. Counting back two weeks from expected period start puts probable conception around 7/8. Plus or minus three days includes ex sex on 7/6. ultrasound read as 5 weeks on 7/26 moves conception back about a week earlier. if sometimes your cycles are closer to 28 days, that month might have been closer to 28d if you hadn't conceived. Bottom line- to be sure who daddy is you need a paternity test. In large studies about 1/100 women do not know paternity. Regards,

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