Can an Ultrasound Project an EDD of 2 Weeks Early??

So you are saying you only have sex once a month or do you just not realize you can get pregnant every time you have sex?

When you are two weeks pregnant, they calculate you at 4 weeks. It's not really from date of conception but really from date of last period.

First, you need to understand how this all works. The information is based on the first day of her last period NOT conception. Most people do NOT know their conception date. Its not like on the preggers test its says "little baby was conceived on April 17th at 7:36p.m

E stand for estimate. They are "guessing" on the date based on her last period. My first EDD was Aug 29. She arrived Aug. 22. For our second, my EDD was Sept. 7, he arrived Sept. 13. I sure hope my husband wasn't like you and felt there was "funny business" afoot.

If you believe this child may not be yours, you and your wife need counseling and a paternity test. If you are just being funny, its not.

Oh Good Lord.... so you think you are not the father of this child because of an ESTIMATED due date?

Is this your first child? The EDD is ESTIMATED and you cannot prove the exact date of conception.

I guess the next question is why are you making babies with a wife you do not trust?

If this is a legit question, I truly feel sorry for your wife and unborn child.

Estimating due dates is just that, an estimate. My daughter has 5 children. Each birth was different. EDD changed several times. Only one was born anywhere near the last EDD. Our bodies are not precisely programed.

I hope you were just trying to be funny. If you don't trust your wife, your baby will suffer. Consider that the baby needs love and acceptance no matter who the father is. The welfare of the baby should be a top priority.

Wow! Just wow!!! Unless there is more to this story, your poor wife.

All 3 of my children had their estimated due date moved up a couple of weeks after my first ultrasound. All 3 of my children were born before 40 weeks but were all still full term. 40 weeks is just a guess, thus the word estimated is used, using averages that assume a woman has exactly a 28 day cycle (first day of her period to the first day of her next period) and ovulates and conceives exactly on day 14 and that baby takes exactly the same amount of days to fully develop. It assumes a women knows exactly what day she started her last period. Because every woman is different and every pregnancy is different, that 40 weeks is not set in stone and can be off up to 2 weeks in either direction (as in 38 weeks-42 weeks) and still be considered full term and a perfectly normal time frame.
You don't calculate a due date by conception date, you calculate it using the first day of her last period. The calculation considers the woman pregnant an average of 2 weeks before she could have ever gotten pregnant in her cycle assuming she follows the average.
It sounds pretty safe to say that this baby is most likely yours. If you're worried I highly suggest counseling for yourself or for both of you as its not healthy to be questioning the loyalty of your wife like this unless there is a very clear history that you are not sharing, which of course you have no obligation to.

Due dates are estimated at 40 weeks staring from the first day of the last period, which is usually 2 weeks before conception. So January 4th is about right.

That's a pretty big leap to make that your wife had an affair. Maybe marriage counseling is something to consider.

All you have to discuss is names. It's an estimated date. Celebrate and enjoy! I was given about four different due dates for both my children because they were very big.

I thought your due date was projected based on the first day of your last period, not the date of conception? Just pick up the phone and ask the doctor's office.

Using a calculator, if she had started her period on 4/17, her EDD would be 1/22(it's always a good idea to understand the information before wrecking your marriage with unfounded accusations). So I'm guessing you're entering the conception date into these calculators rather than the date of her last period, which pretty much moves the timeline to the beginning of January. So basically you're freaking out over nothing. Unless there's a reason for you to suspect your wife, rather than educating yourself on what all these dates mean, you may want to look at working on yourself and your reactions before your baby is born. Good luck!

Two ways to measure the dates: from the LMP (first day of the Last Menstrual Period) or from estimated date of conception. They are roughly 2 weeks apart, but can be further apart depending on the length of an individual woman's cycle (which isn't always 28 days). So it depends a lot on what the particular doctor or clinic is using as a "start" date. Even so, some use both.

Also, unless you only had sexual activity once that entire month, she could easily have gotten pregnant on a different day. Women's bodies are not machines, and ovulation can occur at times other than what one predicts on the calendar. That's why the "rhythm" method is so incredibly ineffective - because hormones and ovulation don't follow the calendar. And, it's possible for a woman to have some bleeding after conception, including what's called "implantation bleeding" when a fertilized egg implants in the wall of the uterus, and so it's easy to think it's a normal period. That can throw off the dates too.

Upcoming ultrasounds will help to pinpoint the size of the baby as well, and changes in the last few weeks (cervical changes, baby position) will give more indications of approximate due date.

If you were being facetious or you just have never had much education in this area, fine. But if you have significant suspicions, you need to get immediate counseling. No one should bring a baby into a family whose parents are mistrustful. That's no way for a child to grow up. And it's no way to go through the upheavals and stresses of a pregnancy - it just makes everything ugly.

Sigh. Really?

Use the calculator on baby center. You can enter in the date of her last period or the conception date. Due dates are 40 weeks after the last period or 38 weeks after the date you think you conceived. Because most people don't know when they conceived, the traditional calc is 40 weeks from last period. If you use the conception date that you gave, her due date is January 8.

Dude, you're being both an idiot and a bit of a d-bag. Hopefully this isn't really how you think of and treat your wife, the woman who is bringing your child into the world.

It's hard to pin down for many reasons.
Unless you did IVF, you don't know exactly when conception took place.
Sonograms are not that reliable in predicting a due date.
My first sonogram gave us a date and all other sonograms gave us a later date by 2 weeks.
It turned out our son was born precisely on his first estimated due date (this was after 36 hrs of labor and nothing was induced).
Only %70 of babies are born within 10 days of the EDD - so %30 are born no where near their EDD (so they are early or late).
Besides that there is some variance in how long women are pregnant.
It can be as much as 5 weeks difference.

https://www.sciencedaily.com/releases/2013/08/13080620332...

Are you thinking she got pregnant before you got to her?
Like maybe someone else is the father?
It would be nice to work out relationship trust issues before the baby gets here.
Kids are wonderful but they can be a strain on even the happiest of marriages.
Suggesting a paternity test either after the baby is born or during an amniocentesis might prove things one way or the other.

Pregnancy is truly one of the great mysteries of science. With all the technology we have, no one can accurately predict when a baby will be born. The EDD is simply the middle of a one-month window that is the doctor's best guess.

Personally, one of my babies was born more than 2 weeks after the EDD, and the other was born 10 days before. How (or if) any of that relates to their conception dates, I have no idea.

Wow, that is an ESTIMATE! Unless you have a problem in your marriage or you two don't trust each other, why on earth would you think you need to confront her? You need to be damn well sure you know what you are talking about before you say anything to your wife. You cannot be that sure from an estimate! If you come at her with this UNWARRANTED, you are potentially destroying your marriage. Keep in mind there is an innocent baby here as well!!!

S.,

You do not know the date of conception, it can take place anytime up to about 5 days after having sex.

There are two ways to calculate EDD - the traditional way via date of last period and the more modern way of using an ultrasound estimate. Ultrasound is based on size of fetus, make sure the doctor has date of last period. Date of last period assumes that all women have 28 day cycles - also a false assumption. Some women do have 28 day cycles, I go from 18-40 day cycles. Also normal.

You might suggest to your wife that she ask the doctor to consider her cycle and date of last period. Keep in mind all EDDs mean that it would be normal for a baby to come two weeks before or two weeks after.

If you suspect the baby is not yours, get testing done.

You should discuss with her and her doctor (if need be) how they determine due dates. Women come on this site all the time (and question this very thing all the time) because the calculators do not input the conception date. They use the date of the first day of the last period and go from there.
http://www.convertworld.com/en/pregnancy-calendar/

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Wanted to add, that like several of the other ladies here, I can testify that the EDD was wrong for both of my kids as well. I did know the date we had intercourse the likely resulted in our first child... it was a busy time for us, having just moved, and husband was on a wonky work schedule. Still, the EDD I was told was off from my own calculations. I also do not have a 28-day cycle (which is what all estimating tools use as cycle length), mine is typically much longer. Up to 42 days a few times.

That said, both of my kids had the same due date. One was born a week before the EDD. One was born 12 days after the EDD. Neither births were induced labor. Both healthy, full term babies.

You do realize that the ultra sound goes by the SIZE of the baby, right? Some women have bigger babies than other women do.

My sister in law is under 5 foot tall and weighs right at 100 pounds. Every single one of her babies were between 9 and 11 pounds at birth, vaginal birth...ouch!

My sister had really small babies, they were all right at or under 6 pounds. I had average size, around 7-8 pounds.

Plus, some babies aren't born right on that ultrasound timeframe. It is simply a test to make sure the baby is growing on schedule, see if it's heart is beating, and if everything is going according to expectations. Some things don't "cook" or "bake" as long as others do so they come out earlier than expected. It's not a big deal.

As for the rest, why not wait until the baby is born, if you need proof then ask for a DNA test.

yes edd can be off by a week or two.
when i got pregnant with my dd i was on a mini pill. my estimated due date was giving me conception date that seemed late to me. i knew the exact day i missed a pill, and the edd was saying a week later than that. fastforeward to the day i went into labor. and baby came one week earlier than the edd.
it should be a due date MONTH since babies can be early or late according to ESTIMATED due dates.