I see. Alright thank you so much Annie
It depends on the doctor. A due date of March 15, if it came from a magic all-knowing crystal ball that totally knows, says that conception would have been June 23. This would be about one day after the last of the sperm from sex on June 17 would no longer be viable. Unfortunately, one day is not enough of a margin to be sure of anything, and also, you do not know how accurate the March 15 date is in the first place. Some doctors won't bother to change the due date unless the ultrasound says something totally different. You might ask your doctor if he ever analyzed whether the ultrasound measurements and developmental markers (by themselves) line up with the e.d.d. computed from the first day of your last period. If he has not ever compared these, you could ask him to.
The other possibility, though I don't think you need to go this far because the baby will be here so soon, is to get a prenatal DNA test through Ravgen or the DDC. It costs a whole lot of money, but then you would know.
Sorry I keep bothering you.. But does it change anything that my doctor never changed the date when he did do my 1st ultrasound? What's the most likely possibility of who the father could be?
Thanks Annie. I appreciate all of your responses to me. I'm just so stressed out about all of this.
I guess the first thing I would do is ask my doctor to look at my first ultrasound record and see if there is a crown-to-rump measurement that you could use to try to determine when you conceived. Do you go to the doctor without your husband?
If you had to try to figure this out without your doctor's input, if you had a standard 28-day menstrual cycle (which you don't), you would have ovulated on June 23. What you would do is compare your cycles (which obviously vary) and try to extrapolate. A person ovulates about 14 days before her next period. So on the cycles you have mentioned, your ovulation dates were March 21, April 20, and May 26, and your cycle lengths were 30, 31, and 35 days. If you compute a 31-day cycle from June 9, you would expect to have a period on July 8, and counting back 14 days from that gives you June 24.
The problem with all of this is that your cycles are too irregular to be sure that using a 31-day cycle length to do the computing makes any sense. If you have a record from all the last year and every single cycle was a certain length except these three, perhaps you could safely extrapolate. But I'd be inclined to think your doctor could help you more by looking up your earliest ultrasound to try to see if there is any computation of a due date on the record.
No they based it off of LMP date. They never gave me a date based on my ultrasound.