how to determine due date?

jennaonthego · June 2015

Hi. I'm pregnant with #4. This was an unplanned pregnancy. DH and I have been very super careful after we had #3. I know my body very well and I am very diligent with when not to DTD. I have a 28-30 days cycle and I'm always regular. We always abstain from DTD from CD 10 to CD 18. With my 3 other pregnancies, we DTD on CD 12-14 and we were always successful when TTC.

We were vacationing in USVI from CD 9-13. I ended up with strep throat the day after we had gotten home which is CD 14. I began antibiotics right away. I did notice that I had not had any O pain or barely any EWCM. By CD 18, I had begun to feel better and DH and I went ahead and DTD that day. I was so sure that I had O'ed already. We also DTD again on CD 19.

I ended up doing a 2nd round of antibiotics due to having an antibiotic resistant strep throat. By CD 33, I still had not gotten AF yet. I chalked it up to being out of the country for a week and then 2 rounds of antibiotics must have delayed AF. By the eve of CD 33, I realized that I was experiencing what had felt like round ligament pain whenever I coughed or sneezed or moved really fast. I decided to buy a HPT the next morning and sure enough, it was a BFP. DH and I are still shocked. We were DONE after 3 kids (aged 6, 5 and 3).

Now my question - how do I determine EDD? Based on LMP, I am 7w3d but I know I must have O'ed way later because we DTD on CD 18 and 19. Do I determine my EDD based on possible conception on CD 18 or 19?

I don't have an ultrasound appointment yet. I won't see my ob-gyn until July 17th and I'll be few days shy of 12 weeks.

bananers · June 2015

Unless you were tracking ovulation, you should go by LMP until you get an u/s and are told otherwise. You're likely only a few days off anyway, and as you know, babies rarely come on their due dates, so EDD is just that -- an estimate.

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