Can a baby's due date be a month off when determined by an ultrasound?
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- čas přidán 6. 09. 2024
- A lot of women have questions about their due date and how the doctor determined it. And it's usually done 1 of 2 ways. First of all, it's important to seek early prenatal care before 13 weeks gestation. And at that point, the doctor will ask you if you've had regular cycles in the past and when your last period happened. If you know what date that was and you've been regular in the past, then the doctor can pretty reliably calculate a due date off of that, because a woman is fertile for 6 days out of each cycle - 5 days leading up to ovulation and on the day of ovulation. And we know that because you had a period, you weren't pregnant at that point in time, so you got pregnant during that next cycle when you ovulated and egg and sperm met up. If you had irregular cycles in the past or you're not sure when your last period was, then the doctor may send you for an early ultrasound. And this is where they measure the size of the growing fetus, and look at growing structures, and determine your gestational age from that, because a fetus will grow at a very consistent rate during the 1st trimester. So if your baby is measuring 8 weeks, you're reliably 8 weeks along.
Now there's also some confusion surrounding the amount of time the baby has been growing versus your gestational age. The entire gestational period is 40 weeks. However, a baby only grows for 38 out of those weeks, because the first 2 weeks of the gestational period are from the time of your first period till the time of ovulation and conception. So the baby is not actually growing for those first 2 weeks, so that confuses some people. They get caught up in the fact that the doctor told them they were 8 weeks, but the baby has only been growing for 6 - you're just 8 weeks gestation. We standardize it across the board.
Now another commonly asked question is, "Will my due date change if my baby is measuring abnormally small or large later on in pregnancy?". Now I told you that in the 1st trimester, a fetus will grow at a very consistent rate, but thereafter, it can differ. And there are underlying causes that can make a baby be abnormally small or abnormally large, and those are the things that a doctor needs to consider - not changing the due date. So let's say, for example, that you have an ultrasound at 8 weeks, and the doctor knows reliably how far along you are, and what your due date is. Later on in the pregnancy, if you have an ultrasound at 28 weeks for whatever reason and the baby is measuring 32 weeks, they won't just change your due date. And there's a couple of reasons for that.
Number 1, a doctor needs to consider underlying causes and decide if further investigation or treatment is necessary for that. And the 2nd is that if the doctor actually changed your due date and put you a month ahead, that's not going to change how much time the baby has spent growing in the womb, and their organs won't be fully mature when the baby is full-term. If you have more specific questions about your situation, don't hesitate to talk with your OB provider, and they'll be able to give you the best advice and information based on their knowledge of your situation. And if you have more questions for me in the future, feel free to ask them on our Facebook page at / intermountainmoms , and recommend us to your friends and family too.
Noted. Don't go off of last period.
My doctor changed up by conception and due date 4 times and I was sick and felt pregnant weeks before “I got pregnant” also I saw my baby’s face with my 3D ultra sound and she looks just my ex not like the last guy I was with that the current dates match up with and my baby is “ a very good size” for how far along I am
What if you don't find out your pregnant tell your two months
my last period was October 10 2022 and my due date is August 17 2023 which is same as both ultrasound done stated plus 2 doctors. All of a sudden I change and start going to a clinic and the midwife is say July 17 2023. Who should I believe?
You due date is July 17
I'm currently 34 weeks pregnant the 1st due date was estimated by a urine test and a guess of June 21st. However after many ultrasounds they're saying I'm measuring a week ahead of that to be est. June 14th. I'm feeling Braxton Hicks contractions occasionally already
. So I'm guessing maybe early June?
28 weeks preg...cant wait for this to be over.
I have 3 due dates. At the 20 week scan the tech said my latest one. I switched drs and they stayed with the one tech said. Seems dumb to me they couldnt stick with the first one i got
What if you had a miscarriage? I never had a cycle before pregnancy...
Can a fertilised egg take longer than a month to implant?
So my last period was June 20th 2023... I found out I was pregnant on August 7th... here in lies the problem the ultrasound is showing I'm 11 weeks 3 days..but with my calculations in 10 weeks 3 days.. I've been tracking my ovulation on the 7th day of my period so from the 20th June to the 17th July I had no intercourse with my husband. How then can my conception date be the week of the 10. My cycle runs 37-50 days...
My ultrasound scan shows 21 weeks and according to lmp its 23 weeks my cycle was irregular the first trimister and second trimister showed same diffrence of 2 weeks...does this means my baby growth is bad??
That means you had a late ovulation
Hey! I ended up moving during my pregnancy and at first they said my date was October 1st and once I moved the new doctor said it was October 29th. I technically had a full blown period the week of Jan 4th, but I had a very light “period” in February. The old doctor made my date based off of the January 4th and the new doctor based it off of the February date. But I’m having contractions that are 10mins apart as of yesterday and I’m 2cm. 😳 Idk which date to go by at this point.
I'm currently in the same situation,I am due in November but doctor says mid October😞I'm Scared
When did u end up having the baby?
When did you have your baby ?
@@graceletsatsi3503 any updates?
My OBGYN, told me that I was 15 Weeks- I found out on May 15th, I know for 100% I had my period in March 2nd-7th, I conceived around the 9th or 10th. I know I had my period & not just sporting because I had my fiancé go out & buy me tampons, & it was a regular 5 day long period... I know there is nooo way I’m that far along. When I found out in the hospital by a doctor that I was pregnant he said your about 2 weeks, which made sense. March 7th we conceived, I found out March 15th. Give a week or so.... she did a quick ultrasound & said firstly, the due date in February, then changed it too December im like nooo way?!! I even bought a heart beater too hear at home & my GF who’s a nurse said no way you’re 15 Weeks... your 2 1/2 Months not 4! Idk 😐 very confusing....
Once you hit your second trimester they can measure the size of the babys head and tell you pretty accurately how far along you are. However, it can be normal to be a week or two off. But if you know when you got pregnant then go with that.
Thank you!! I had my due Date changed once again! I conceived on May 4th, I had my period end of April- I know it was very early May the conception. So would it make sense for my due date too now Be January 2nd- instead of what my doctor had originally gave me which was January 25th?..
I found out by my doctor May 15th my pregnancy. My due date had gotten changed 3-4 times but now that I’m 23 weeks, the measurements of the baby he is saying definitely & 100% January 2nd- my conception was May 4th which does make accurate sense since I had my period end of April & we did conceive that early in May.
I m in the same dilemma
I know my due date is August and based on their scan I m due July 8th July . But I m not going to allow them push me I m having this baby when he is ready to come into this world
@@racheljersey8247 when was your baby born? I’m dealing with the same.
Hi Dani, thanks a lot for the helpful videos! By my dates, I was about 12 weeks along at the time of my scan. The sonographer said I was 13.5 weeks along. However that's not possible as I know the time me and my husband conceived the child and if their dates are right, then I got pregnant when I was on my period! Or I got pregnant and then had my period (which was definitely my period, it was as usual, painful and heavy), which isn't possible. Can I just have a big baby? Thanks in advance.
Santa G. Hi how is your baby now? The sonographer was right or not because i have the same problem as you now
@@ikramhairchi2666 how is your baby sir??
I have the same problem
i am in 8 month pregnancy i have gdm i am taking insuline 8 unit per day.. but my sugar level is coming high 160 after two hours.... how it will effect my baby please reply...
My lmp date is august 14 so when is my EDD? Please can u tell me?
So if the baby is larger does that mean women get pregnant before LMP
Hi I was supposed to be on my 10 weeks and 5 days pregnancy based on my LMP, but when I had the ultrasound it turns out I was only 5 weeks and no FHR detected yet.. is there anyone suffered from the same scenario I had? And what happened?
Hi.. i am same boat,. What was ur results.?
You're probably have long cycle and ovulated late.
Hey plz update me what happened cz i am in the same situation i was sure i am 10 weeks bt the ultrasound said am 6weeks pregnant
I have gone through this ,am pregnant with almost 4month but in ultrasound they consider only two month with no heart beat so it missed abortion😢😞
Can someone help me resolve my mystery? I am 9 weeks pregnant by both ultrasound and LMP. I had sex just two days before my menses and about a week after with two different men. I strongly believe it’s for the second guy but based off LMP and US, it will be for the first guy and I don’t know how that’s possible when I was two days away from my menses?
I DNT get it! My last period was march 4th for sure! However when I went to have my first ultrasound she said I was 8 weeks therefore my due date is Jan 20th how is that possible?! I DNT get it! That's like a month apart from the due date based on my last period
Lucia Lozano hey I’ve been having the same problem ever since I found out I was pregnant but the doctors put me 5 weeks behind and doesn’t add up.
@@katierodriguez2389 I know it's so off! I was doing some math and the latest I come up with a due date would put me at December 28th, see I remember that by the last week's of April I already had pregnancy symptoms so I ovulated before the date doctor think I did. Are u irregular on your periods?
Lucia Lozano my periods are regular so I know when they’re expected to come.Never had an irregular period in my life neither have I missed one until I became pregnant of course.I wouldn’t even be pregnant at the time I found out with what the docs are saying.I can tell you more about my story if you’d like...Just tell me how.
Probably confused it with implantation
Any update? Did your weeks add up ?
Doc. I have a problem with my girl friend. Her last manstruation was on first a week of Feb. Then she went to a holiday on a 16th of march and she slept with someone else and that was on the 18th of March. She went to a Private Doctor for a scan yesterday(3rd May). She came with the results of 7 weeks 1 day. Off which it took us back to the 15th of March the last day we had sex before she go to a holiday. We've been dating for 15 months and without a condom and after I found out about this incident she came to me and told me that she's preg. My question is could it be possible that the child is not mine?
Siphamandla Botha if so they baby would be due today.
So was it yours???
We need an update
Update please?
Dont worry about an update u all ddnt help me🤣🤣
My doctor didn't ask je just did it
There is a such thing to where last menstral date doesnt mean crap I'm 5 weeks almost 6. And if i went my lmd if be 8 weeks. I ovulated late in the month of may like the last full week of may. If I go by when i know i ovulated my ultrasound is correct
Your ultrasound scan show 2 or 3 weeks behind pregnancy ?
My last period was April 29th i am currently 14 weeks and 3 days. If i went by last period i would be 17 weeks. I ovulated late. My comment is to say not all women ovulate at 12 to 18 days after a period. I was one of them. My baby is fine and growing so fast.
@@zobiahamid6925 and yes a baby can be 3 weeks behind what it is suppose to be and still be alive and well. Ask a doctor if a women was to ovulate super late my period was April 29th i ovulated may 28th conceived June 3rd so i ovulated almost 30 days past the first day of my last period. I hope this makes sense
Update??? Did your baby measure right now ? Did it change?
@@sherridabaksh3603 update im having a baby girl and she will be here in less than 25 days. I had a subchorianic hemorrhage at 7 weeks 2 days. Baby also has a single umbilical artery!!! And will be a small baby. But everything was just fine!!. You cant always go by last menstral date!!! Im 35 weeks 1 day. Baby will be delivered before due date. Thats all there is to update. Thanks for checking in!!!
you're so beautiful 😅
Davidryresegibsonsonbad
Mam, I am from india, plz suggest me what will happen to me. 8 weeks ago I had last period and my ultrasound says that I have only 6 week baby,doctor said that it might be miscarriage.
Hi priya what happened then? As my dr told me exactly the same & i m spotting too
@@zahramalik1278 thanks to god that everything is alright. I met another doctor, she said don't worry ,it happens sometime and now it's my 8th months of pregnancy..☺️
@@shanupriya5188 same with me my lmp 25 nov.2020 by lmp my due date is 1 sept.and by 1st scan due date is 19 September 2021 due to delay pregncy this is my 2nd pregnancy and 1 st was normal delivery and waiting for labour now I think this is girl child thats why taking too much time
@@anshbhushan582 👍👍
@@shanupriya5188 meri delivery hogai