I feel like my due date is off and I am needing input!

Kaitlyn - posted on 07/02/2016 ( 3 moms have responded )

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So, my LMP started on April 24. my cycle is 26 days, and I used a pregnancy app for 6 months, according to it, I would have ovulated on May the 6th. I had an appointment 8 weeks from my LMP and they said I was 6 weeks, according to LMP and 4 weeks according to conception, I also had 2 gestational sacs and was diagnosed with a blighted ovum, other baby is healthy. I had already missed my period so I was pregnant, and if that was correct that means I ovulated when my next period was due? It just doesn't make much sense to me because at that point, when they said I was 6 weeks, it would have made sense based on conception but it made no sense when they told me it was LMP? Confusing, I know.

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Sarah - posted on 07/02/2016

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Maybe it is time to change doctors. Your OB is someone you should have a good relationship with and be able to ask questions.
Did they give you a due date? If yes, go from that date.

Kaitlyn - posted on 07/02/2016

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My doctor isn't helpful at all or I would ask. But I am confused because I had already had a positive pregnancy test when they said I conceived.

Sarah - posted on 07/02/2016

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According your LMP you would be 9 weeks and 4 days, regardless of when you ovulated. That is just an old school formula to determine your EDC (estimated date of confinement), the same formula puts your due date at Jan 31st.
However, if you have had an ultrasound done, those measurements of the fetus are super accurate and can estimate gestational age within 48 hours. Especially if you had one done early on in your pregnancy. The US report should produce a due date as well. Many doctors are choosing to follow the US report and set your due date and date your pregnancy. I get is is confusing and can be frustrating; especially if you thought you were further along and now you are set back a couple of weeks.
It is very possible you ovulated late. Most women ovulate 14 days before the first day of the next period, so I see how you calculated ovulation on May 6. Since it look from you US that you may have made more than one egg, perhaps you did ovulate a bit late or fertilization did not occur when you thought it did. Ask your doctor the next time you go in, to clarify your due date and congrats on the pregnancy!

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