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The Rare Occasion of a Hidden Twin. There are some rare exceptions. Ultrasound provides a picture of the womb, but sometimes the picture can be misleading or misinterpreted. If there is no evidence of multiples on ultrasound, chances are you are not having twins. You can usually see a baby in the uterus on an ultrasound at about six weeks gestation, so this is the earliest that you could theoretically diagnose a twin pregnancy.” While a hidden twin can.

What usually happens when a twin is hidden, according to Verywell Family, is that early ultrasounds might visualize only one embryo. A later ultrasound might reveal there actually is another baby. He says that usually, a hidden twin on an early ultrasound will be seen later on the second trimester ultrasound, like the 5-month anatomy ultrasound. Even though it is a rare phenomenon, he notes.

Hidden twins are exactly what they sound like – a twin pregnancy that goes undiscovered. Twins can be detected on an ultrasound in the first trimester — as early as 4-6 weeks after you miss your period, and their heartbeats can be found at 6-8 weeks (it’s also pretty hard to distinguish two heartbeats, and having two doesn’t always indicate twins ). At a twin ultrasound 5 weeks scan you may have a hunch that you are pregnant with twins. Maybe you know that your chances are higher due to your family history or use of fertility treatment. In either case you’re probably curious to know how early you can detect twins.

It depends on the chorionicity of your twins. Yes: Usually both twins can be examined in detail with ultrasound, but occasionally one is more difficult due to positioning. Rescanning a different day ma Read More. Who knows if here could be a hidden second baby? And if so where? And if not why not? Is there anything strange with this ultrasound? Can somebody explain what is wrong in this ultrasound.

Yes it is possible. Has NOT happend to me.but I worked with a girl who had a hidden twin her entire pregnancy she had 3 US’s throughout and they never suspected there was another one in there. The day she delivered, she had TWO healthy baby girls. Explore Multiples and More’s board “Twins Ultrasound”, followed by 952 people on Pinterest.

See more ideas about Twins ultrasound, Ultrasound, Twins.

List of related literature:

The membranes surrounding this twin are not visible on ultrasound examination.

“Fanaroff and Martin's Neonatal-Perinatal Medicine: Diseases of the Fetus and Infant” by Richard J. Martin, Avroy A. Fanaroff, Michele C. Walsh
from Fanaroff and Martin’s Neonatal-Perinatal Medicine: Diseases of the Fetus and Infant
by Richard J. Martin, Avroy A. Fanaroff, Michele C. Walsh
Elsevier Health Sciences, 2010

The first twin can be monitored on the CTG machine either with a scalp electrode or by abdominal ultrasound transducer, with the second being monitored by ultrasound.

“Essential Obstetrics and Gynaecology E-Book” by Ian M. Symonds, Sabaratnam Arulkumaran
from Essential Obstetrics and Gynaecology E-Book
by Ian M. Symonds, Sabaratnam Arulkumaran
Elsevier Health Sciences, 2019

Fetal ultrasound can detect the presence of conjoined twins in almost all cases.

“Pediatric Surgery E-Book” by Arnold G. Coran, Anthony Caldamone, N. Scott Adzick, Thomas M. Krummel, Jean-Martin Laberge, Robert Shamberger
from Pediatric Surgery E-Book
by Arnold G. Coran, Anthony Caldamone, et. al.
Elsevier Health Sciences, 2012

This twin was the first to be tapped after ultrasound was used to identify a fluid pocket and then removed to prep the abdomen.

“Smith's Recognizable Patterns of Human Deformation” by John M. Graham
from Smith’s Recognizable Patterns of Human Deformation
by John M. Graham
Saunders/Elsevier, 2007

Sometimes an ultrasound is a good idea in the case of suspected twins.

“Spiritual Midwifery” by Ina May Gaskin
from Spiritual Midwifery
by Ina May Gaskin
Book Publishing Company, 2010

If the patterns are not different, move the ultrasound until you find the second twin.

“Labor and Delivery Nursing: Guide to Evidence-Based Practice” by Michelle Murray, PhD, RNC, Gayle Huelsmann, BSN, RNC
from Labor and Delivery Nursing: Guide to Evidence-Based Practice
by Michelle Murray, PhD, RNC, Gayle Huelsmann, BSN, RNC
Springer Publishing Company, 2008

If the second twin presents as transverse or breech, external cephalic version under ultrasound guidance may be attempted.

“Clinical Maternal-Fetal Medicine” by Hung N. Winn, John C. Hobbins
from Clinical Maternal-Fetal Medicine
by Hung N. Winn, John C. Hobbins
Taylor & Francis, 2000

In one pregnancy, a dead twin was the likely explanation of the elevated AFAFP in the other sac, but ultrasound study was insufficient to reassure the parents, who elected to abort.

“Genetic Disorders and the Fetus: Diagnosis, Prevention and Treatment” by Aubrey Milunsky, Jeff M. Milunsky
from Genetic Disorders and the Fetus: Diagnosis, Prevention and Treatment
by Aubrey Milunsky, Jeff M. Milunsky
Wiley, 2011

If the initial diagnosis is made very early in pregnancy, a repeat ultrasound several weeks later will confirm the presence of twins, rule out anomalies and determine chorionicity.

“Joints and Connective Tissues: General Practice: The Integrative Approach Series” by Kerryn Phelps, Craig Hassed
from Joints and Connective Tissues: General Practice: The Integrative Approach Series
by Kerryn Phelps, Craig Hassed
Elsevier Health Sciences APAC, 2012

Absent a provider skilled and experienced in IPV and breech extraction, vaginal delivery of the first twin followed by external version of the second is a viable alternative, using ultrasound in the delivery room to directly visualize the fetus.

“Obstetrics: Normal and Problem Pregnancies E-Book” by Mark B Landon, Henry L Galan, Eric R. M. Jauniaux, Deborah A Driscoll, Vincenzo Berghella, William A Grobman, Sarah J Kilpatrick, Alison G Cahill
from Obstetrics: Normal and Problem Pregnancies E-Book
by Mark B Landon, Henry L Galan, et. al.
Elsevier Health Sciences, 2020

Oktay Kutluk

Kutluk Oktay, MD, FACOG is one of the world's foremost experts in fertility preservation as well as ovarian stimulation and in vitro fertilization for infertility treatments. He developed and performed the world's first ovarian transplantation procedures as well as pioneered new ovarian stimulation protocols for embryo and oocyte freezing for breast and endometrial cancer patients.

Mail: [email protected]
Telephone: +1 (877) 492-3666

Biography: https://medicine.yale.edu/profile/kutluk_oktay/
Bibliography: oktay_bibliography

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15 comments

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  • I have 9weeks+3 and I was already at 3 doctors,1 doctor see only 1 egg whit baby and 2 from them tell me that they see 2 eggs:1 egg whit baby and 1 empty.I just hope after 12 weeks they will see 2 babys

  • I’m 17 weeks and can’t shake the feeling. I wouldn’t put it pass the OB to miss another baby because I’ve only had one ultra sound and she only focused on the baby once she seen it, she didn’t real search around any further. I keep having these dreams that I’m feeling 2 babies move and this is a recurring dream that I just can’t shake!

  • I’m 25 weeks Thursday and I found another baby in my 3 D and I been feeling like I’m having twins since I found out and in my first first ultrasound I seen another sac they said it was nothing and I have my 3D ultrasound and I showed a few people and they see the other baby but my doctor say it’s just one and I know I just know it is twins God keeps giving g signs I just now it my I’m been saying in pregnant with twins since I got pregnant and my mother is never wrong just saying lol

  • At my 8 week ultrasound it was just one baby. But the heartbeat wasn’t strong so I went back 2 weeks later…and BAM, 10 weeks pregnant with di/di twins.
    I’m 30 weeks pregnant with them now

  • I had twins that were back to back didn’t know I was having twins until I gave birth they were full term 7 lbs 4oz and 7 lbs 14oz and I had 6 ultrasounds done because I gained so much weight so good luck

  • I`d still have said two,but then i was HUGE with my 2nd pregnancy! Like you Sarah,i just seemed to discover i was expecting,then my body popped! We were away at 3 months,and i had people coming up asking if i was ok,and how many DAYS i had left!LOL.Sign of a healthy baby..oh and i`m still not sure if it`ll be boy/girl…Hmmmm:)xx

  • found you and subbed. When I had Ash (25 years ago) there was nothing given to me at all, until I had her, then they gave me a bag of information to take home…by then I knew what I needed to know LOL Great updates…that did look like another baby shape to me.. I always wanted 4 but it wasn’t meant to be (endometriosis) looking forward to all your updates and going on your pregnancy journey with you guys love and hugs xoox

  • So exciting Sarah,and for sure i can see what you are?:) x Double trouble,and twice the joy?:) Hope you`ll find out next time xo

  • hi Sarah, I was just on ur live, I’ve bee put In timeout 2wise & now been blocked, I never said anything to be timed out or blocked, its not rocket science to see who has done this! mummy of boys needs to grow up after all she’s supposed to be the adult, have a good nite & yes I think u are having twins too x

  • What is your baby move is how a steel shot ultrasound but it was taking it my baby will it be like in the air but not on it was like there was a shadow behind ultrasound and I have the same feeling that you have but this was my first ultrasound of my 4 pregnancy 10 week 6 day at that time first ultrasound pregnancy none of them or any other were look similar could be in and I feel the same way that you feel like there might be twins if you are getting your dream come true

  • Don’t think I will ever get over how amazing pregnancy is, enjoying following your journey & am intrigued to find out if you are carrying more than one:) You are looking well Sarah, your hair looks fab so shiny xx

  • Doctor said they heart beats with a droppler i go in for an ultrasound they said there is only one but then again im gaining tremendouz amount of weight compare to my single baby
    .. being feeling movements and kicks since begining of pregnancy could there be a hidden twin?

  • You don’t get a pregnancy book here in the states, what happens here is you find an OB/Midwife depending on which you want to go with and depending on who your insurance covers and then that OB/midwife see’s you through your whole pregnancy and all of your records are kept on the computer at their office and then when you go into labor you just head to the hospital and they admit you and that’s pretty much it. Although at your first appointment you usually do end up with a goodie bag full of samples of pre natal vitamins and various baby products and then some info brochures…. That’s how its done here in Utah anyway.

  • I’m 28 weeks with triplets and at our first ultrasound we saw 2, then right before they would normally end it, baby C popped in! We did IVF and transferred 2 embryos, but they’re tri -tri so it’s possible we conceived during our transfer cycle! God’s proof miracles are happening every day!

  • I had an ultrasound done at 7 weeks and it showed 1 baby. BUT I look like I’m 5 months pregnant. I feel like I’m growing every single week. I’m only 9 weeks as of today.