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Doctor insights on: How Big Is A Fetus At 29 Weeks Gestation

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I am 29 weeks pregs. Fetal gestational age is already above 31 weeks. But my uterus size is only 27-28 weeks. I hope things are normal. Pls advice?

I am 29 weeks pregs. Fetal gestational age is already above 31 weeks. But my uterus size is only 27-28 weeks. I hope things are normal. Pls advice?

Unclear: From your information it looks like the uterine size is appropriate for your gestation. I'm not sure what you are referring to as gestational age. If there is a question a sonogram should be able to accurately asses growth. ...Read more

Dr. Lynne Weixel
4 doctors shared insights

Pregnancy (Definition)

When your due date arrives, you will be more than ready to have your baby! Most women deliver the baby somewhere between 37 and 42 weeks. According to the American College of Obstetricians and Gynecologists, only 5% of babies arrive on the exact due date. Approximately 7% of babies are not delivered by 42 weeks, and when that happens, it is referred to ...Read more


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Would there be a (big) difference in the measurement if a 12wk old fetus compared to a 9wk old fetus? The gestational age would be determined in u/s?

Would there be a (big) difference in the measurement if a 12wk old fetus compared to a 9wk old fetus? The gestational age would be determined in u/s?

Yes: An first trimester sonogram is fairly accurate at dating a pregnancy (within a margin of error of about a week). At 12 weeks menstrual age with a viable pregnancy a sonogram measurement of 9 weeks would change the dating of the pregnancy and your due date should be based on that sonogram. Later sonograms should not change this established date. ...Read more

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Can 12 week dating scan be off by 2 weeks? Could a 10 week gestational age fetus measure as big as 5.6cm?

Can 12 week dating scan be off by 2 weeks? Could a 10 week gestational age fetus measure as big as 5.6cm?

Yes: Ultrasound scanning is related to the skill of the sonographer. Typically a 10 week scan has three days of error built in when the test is performed vaginally. There is more error with an abdominal ultrasound. Average crown rump length at ten weeks is approximately 3-4cm. ...Read more

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Yesterday they did a us it show 5wk gestation sac no fetal pole my big is 4446.2 when did i concieve what's my due date i need serious help please?

Yesterday they did a us it show 5wk gestation sac no fetal pole my big is 4446.2 when did i concieve what's my due date i need serious help please?

Follow up with OB: Another us is indicated to see if this is a viable pregnancy in 7-10 days. Based on the ultrasound date the edd would be 09/13/2013. Based on a 28 day cycle conception would have occurred approximately 01/07/2013. ...Read more

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Is there a big difference in fetal development and maturation if a baby was born at 31 weeks compared to 35.5 weeks?

Is there a big difference in fetal development and maturation if a baby was born at 31 weeks compared to 35.5 weeks?

yes: You are talking about a difference of about ten percent and the difference between the two gestational ages is significant. Most 35 weekers will do ok from a lung perspective but many 31 weekers will have resp. Issues. Both are preemie but one is much closer to term. ...Read more

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What is the chance of survival for a 29 weeks fetus who weighs around 1000 gramma?

Need more info: It matters much more that the fetus has reached a gestational age of 29 weeks, where survival is extremely good. Also, a fetal weight of 1000gm at 29 weeks is 15%ile and not abnormal. Whoever is asking needs to ask their ob/gyn. ...Read more

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Internet and all my friends say they get tested for gestational diabetes between 24-28 weeks, but I got tested when I'm at 29 weeks.Isn't it too late?

Internet and all my friends say they get tested for gestational diabetes between 24-28 weeks, but I got tested when I'm at 29 weeks.Isn't it too late?

Its ok: sometimes due to scheduling, some women are unable to be tested in that time frame. a testing at 29 weeks will be more sensitive in detecting gestational diabetes (your pregnancy hormones are more active) and if you have a positive test, you may need further testing/treatment. ...Read more

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Im 29 weeks pregnant, fetus too small?(2 lbs.) should I be worried? My 1st baby only weigh 5lb.10oz at 36 weeks?

Im 29 weeks pregnant, fetus too small?(2 lbs.) should I be worried? My 1st baby only weigh 5lb.10oz at 36 weeks?

Depends: There are two types of small babies. Some babies are constitutionally small because their parents are smaller people. If you had a previous small baby then maybe that is your situation again. Other times babies are small because there's a problem with the placenta. Sometimes this can be due to conditions such as high blood pressure or diabetes your doctor knows best how concerning the smallness. ...Read more