Well, you have said:
My due date is on January 4, 2017 according to my ultrasound. [In your 13th week.]
On March 23rd, I had unprotected sex with guy A in the evening and guy B in the morning. On March 27, anytime around April 1-3 then April 16-17 and April 23-24 with guy B.
(In short, you did have sex in April.) If you look up a conception calculator online, or just use a regular calendar and count backwards 266 days from January 4, it counts back to April 13 for an estimated conception date.
The margin for error is about a week or perhaps up to 9 days, when the ultrasound is as late as the 13th week. But even counting back 9 days only takes you back as far as April 4, not March 23. All the sperm from March 23 would have been long gone.
Hello Annie! I would like you to know that I gave birth yesterday, December 28, 2016. Though, it's really difficult to recognize if who's the father but I can tell that my baby looks 60% like guy B. I would like to know if my conception date will remain the same even if I gave birth a week before my EDD?
Hi Annie! I had my third ultrasound on December 9 which put me to 35w 3d and it gave a due date January 10, 2017. On June 29, according to the ultrasound I was at 13w 0d and my EDD is January 4, 2017. And on August 29, EDD is January 11, 2017. So now, I am just wondering if my ultrasound at my 35w 3d can be 3 weeks off? If yes, does it change my ovulation/conception date? Thanks, Annie.
Annie! Just some clarifications, I got my first ultrasound when I was 15 weeks pregnant based on my LMP. But when I got my ultrasound, on June 29, it says that I'm on my 13weeks. Does this change anything? Because I remember you saying early ultrasounds are more precise than later ultrasounds. I don't know, but by reading some of the situations we have in this forum makes me wonder about it.
I got your probable date of ovulation from your due date of January 4. The estimated ovulation date for January 4 is April 13. But that would only be this precise if the estimated due date came from early ultrasounds (6th week, 7th week, etc.). Since your first ultrasound seems to have been in, what, your 14th week GA? there will be a possible margin for error of at least a week, and possibly a larger margin for error from the second. That was why I was asking where your due date came from.
Anyway fortunately even with the margin for error coming from a later ultrasound, nothing about a January estimated due date suggests conception in March.
I keep getting April dates for conception, not March dates. It doesn't sound like guy A had much to do with anything. Were you sleeping with guy B around April 13?
Have you had ultrasounds in this pregnancy? How did you get your due date?