In October or November?

You likely ovulated and conceived around November 15. So sex between about Nov 10 and Nov 16 got you pregnant. At 6 weeks, this is very accurate (about plus or minus 2 days).

Take care!

This is still accurate even if I can not remember my last lmp?

Or was i six weeks pregnant and my lmp was at 8 weeks, I'm not really getting it can your further explain how they come up with this not knowing my period

I ask because i had sex once in October around the 10 th and than a bunch of times in November

Conception does not have anything to do with LMP, only with ovulation.

With an ultrasound they look at the baby's growth and the development of the internal organs. At 6 weeks (plus or minus 2 days), they will see the heart for the first time. These developments take place according to a very strict schedule in early pregnancy (frst trimester and up to week 1. For this reason early scans are very accurate (week 6 to plus or minus 2 days, week 18 to plus or minus 7 or 8 days).

The baby's age given to you is a gestational age (GA). It is 2 weeks longer than the fetal age (FA). So if you had perfect 28 day cycles with ovulation on day 14, counting backwards the GA will match your LMP date exactly and FA will match your ovulation exactly.

Since our cycles are very seldomly perfect, GA just counts back to some arbitrary day close to your LMP. GA - 14 days (the fetal age) will however always count back to around ovulation and conception.

So I didn't get pregnant in oct, and for sure in nov?

Once again - You likely ovulated and conceived around November 15. So sex between about Nov 10 and Nov 16 got you pregnant. At 6 weeks, this is very accurate (about plus or minus 2 days).

This is based on your 6 week 3 day ultrasound and it is 100% certain that you conceived from sex in November, not October. If you still have any doubts and you were involved with more than one partner, get a paternity test done.

Best of luck.

No I had sex once in oct with one person and sex with the same person multiple times in November. But you said your 100 percent certain about nov so I trust you so thanks

I was only involved with one person in nov, do I still need a DNA test?

No

No

Also I had a friend who was 7 weeks and had a d&c abortion they said her pathology report was 7 weeks just like the ultrasound. Are those 2 supposed to match up and do they mean the same thing.

And no it was not me I had my baby

Yes and Yes