Conception date

kingsMom1234 · September 2014

If my last menstrual period was march 26th and they go off your lmp why is my due date jan/9 and not dec /31 ?

starzcookie22 · September 2014

My LMP was march 16 and I'm due jan 1st . It's all when you ovulated. I ovulated late. ;;) .

mandikins27 · September 2014

Mine was april 27th conception day was may 11th mothers day gift

and im due jan 31st

Mrs_Bennett · September 2014

Like the PP said, it just depends on the date that you ovulated. The "average" day to ovulate is 14 days after the first day of your period, but it sounds like you ovulated (and therefore became pregnant) later. Totally normal. Your due date was set by your first ultrasound (around 8 weeks), which was the most accurate dating ultrasound -- anything done now is probably off by a few days or even a week because babies grow and develop at their own rates.

bustysinclare · September 2014

My last period was April 1st and by LMP my due date would be jan 6th, but its actually Jan 8th. I ovulated a bit later than day 14 it would seem. That's totally normal for me, I usually have a slightly longer cycle

LovelyLips · September 2014

My Lmp was also 1st April. Due date is 6th jan. Both u/s scans have stuck to that date so I must have O'd and conceived within a few days of each other. It's all down to the O date really.

I was glad I O'd around about when I expected too as my cycle was prob a bit messed up from m/c in jan and was hard to predict.

LadyXaverian · September 2014

Do you know when you ovulated and conceived? If not, they probably set your date based on an ultrasound.

Eyefrog · September 2014

this pregnancy is the first one we aren't going by my actual LMP. We are going by my predicted late ovulation and early u/s dates. By LMP I would be due Jan 19, By first u/s I would be due Jan 28, we went with FF and 2nd/3rd u/s which puts me at Jan 25th. FF has been accurate for myself in the past. As pp said, Ovulation can definitely make all the difference.

SheHulk723 · September 2014

Yeah, when I had my first ultrasound they told me my due date was going to be two weeks later than I had guessed based on my lmp. I felt like I had to redo those two weeks of pregnancy hahaha. But my doc said it was probably just wonky ovulation time.

Babytime1778 · September 2014

kingsMom1234 said:

If my last menstrual period was march 26th and they go off your lmp why is my due date jan/9 and not dec /31 ?

LMP for me was March 26 also and I know the conception date was April 9th and my due date is 1/1/15

southernyankeegirl · September 2014

They use LMP as a way to guesstimate, but an ultrasound would overrule that as they can predict within a very small margin of error exactly how long it has been since ovulation based on the measurements of the baby and the uterus.

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