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for ladies who know when they conceive

post #1 of 12
Thread Starter 
Does your conception date match up to your conception date on ultrasound? And also are conception chances higher on the actual day you dtd?
post #2 of 12

This pregnancy my dates match pretty well on ultrasound, maybe off by a couple. I am positive of the dates though.

As for conception chances being higher on the day of dtd, I think it depends on if you know your cycle and are charting. I knew I had a GREAT shot because I had more egg white cervical mucus than ever before, so we dtd.

post #3 of 12

My 10 week dating u/s dated me just one day ahead of conception/ovulation date. You can't conceive if you haven't o'd yet so I don't really understand your question about when you dtd. You can have sex a couple of days prior (or more since sperm live up to a week or more in fertile cervical fluid) but you can't conceive until you ovulate.

post #4 of 12

My first dating us had me 3-4 day behind when I would have been due for conception.  I think it is accurate as we dtd at a time we thought was marginally safe and I think the sperm lived 4-5 days. I also have a girl, which according to some comes from longer living sperm. 

post #5 of 12

Spermies can hang around waiting on the ovulation for up to a week, so if you have the possible "conception date" based on DTD, it's that day or anytime in the following week.

 

I have had an early dating ultrasound (10 w) with only one pregnancy where I was 100% sure of ovulation date and I watched my doctor pull up a date that was about 4 days off, then very slightly tweak the cursor and suddenly she had +1 from my date and called it "good enough" and went with my date.

 

My other ultrasounds have been at 20w and have been off by 1-2 weeks from the real date.

post #6 of 12
Despite me being certain and probably annoyingly vocal that I ovulated on day 21 of my cycle, dr has consistently followed LMP to predict due date. First ultrasound was at 19w-ish so never got confirmation of "my" date even though baby was measuring consistently small. I think w next pregnancy, I will be much more adamant in making sure I get early preg u/s for dating.
post #7 of 12

cardigan - same thing happened with me and DD. So I ended up getting threatened with induction. She came spontaneously before then any way but for future reference I'd just use your LMP and the date 14 days before O. I didn't do that this time because I was going to the same clinic as I was for infertility so they had LMP in my infertility file and didn't want to lie but I did that with my babies I miscarried. No idea if I'll get PG again but if I did I"d just adjust my LMP date to avoid all the arguments about how silly it is to assume everyone O'd on CD14

post #8 of 12
Edelweiss: I totally would have adjusted my LMP, and will next time. but I see a family care Dr and visited them for other reasons about a week after LMP the cycle I conceived so it was already in the system. ugh!
post #9 of 12

Isn't it really ridiculous that they can't accept "I ovulated on day __" and use that?? With DD we didn't even have sex till CD 19, and you really think she was conceived on CD14?????

post #10 of 12
Quote:
Originally Posted by Edelweiss98 View Post

Isn't it really ridiculous that they can't accept "I ovulated on day __" and use that?? With DD we didn't even have sex till CD 19, and you really think she was conceived on CD14?????

 

Yup!

 

Not with this one, but with DS1 we were on vacation when they claimed we conceived.  Since we were sharing a full sized bed with our 2 year old AT my parents house with a houseful for Thanksgiving we were 100% sure we did not conceive that date.  We knew it was at least 4 days later, which meant we could have conceived up to 9 days later.  DS was born 9 days "late" according to the u/s.

 

We were much more proactive this time on insisting on a later date in spite of the u/s saying we were due 7/28.

 

Additionally, I was surprised to find that "early u/s" are really before 8 weeks, because I had heard 8 week u/s referred to as early, but to get the really precise dates you actually need to be looking more at a 6-7 week u/s or before.  This time our u/s wasn't until 12 weeks which already has around 7-8 days of error.

post #11 of 12

I am really glad I never had any issues getting them to take my dates....  With my last, I ovulated a MONTH late - yes, I ovulated on CD 42.  I guess it did work in my favor that I had an appointment at CD 30 something where I had a negative pregnancy test, so they knew I had ovulated late anyway. ;)  But I can't imagine if they had refused to take my dating - he would've been considered 3+ weeks "over" when he was born at 39+1.

post #12 of 12

I am really glad I never had any issues getting them to take my dates....  With my last, I ovulated a MONTH late - yes, I ovulated on CD 42.  I guess it did work in my favor that I had an appointment at CD 30 something where I had a negative pregnancy test, so they knew I had ovulated late anyway. ;)  But I can't imagine if they had refused to take my dating - he would've been considered 3+ weeks "over" when he was born at 39+1.

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