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Doctor insights on: Pregnancy Wheel Calculator Gestational Age

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How accurate are clearblue digital pregnancy test with conception calculator?

How accurate are clearblue digital pregnancy test with conception calculator?

Positive test: They are accurate to determine if you are pregnant or not but not very accurate to give you the date of conception. ...Read more

Dr. Tiffanie Noonan
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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I had unprotected sex november 16, 2013 everytime I put that into a online pregnancy calculator under "date of conception" its says im 4 weeks. Why?

I had unprotected sex november 16, 2013 everytime I put that into a online pregnancy calculator under "date of conception" its says im 4 weeks. Why?

Easier calculation: Every pregnancy dating software is based on a 40 week pregnancy. Actually the pregnancy is not 40 weeks but 38 weeks. Not every women knows when they conceive but women know when their last menses occurs. Therefore the dating is from the last menses artificially adding 2 weeks to every pregnancy. ...Read more

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Had sex on the 4th and my fertile days start till 6-11 acording to the fertility calculator. A condom was used is there any risk of pregnancy?

Had sex on the 4th and my fertile days start till 6-11 acording to the fertility calculator. A condom was used is there any risk of pregnancy?

Very unlikely: While it is technically possible to get pregnant on any day of the menstrual cycle, this is true because a person doesn't know when she ovulated. If your periods are regular, your fertility calculator should be quite accurate. Since you had sex, with contraception, outside of this time window your risk of pregnancy is very low, probably not more than 1%. ...Read more

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10+-6days weeks pregnancy crl 3.9.Fhs 162.Growth of fetus is acc to gestational age. Is growth normal♥?

10+-6days weeks pregnancy crl 3.9.Fhs 162.Growth of fetus is acc to gestational age. Is growth normal♥?

Yes: If the report says the growth is accurate to gestational age then that is the same thing as saying that the fetal growth is normal. ...Read more

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After the 6th or 7th week of pregnancy does the fetus double in size, causing the gestational age to be off?

After the 6th or 7th week of pregnancy does the fetus double in size, causing the gestational age to be off?

Early pregnancy: The rate of growth of the fetus in the first trimester is very rapid. An ultrasound in the first trimester has only a 3-6 day error while later in pregnancy that error grows to 3 weeks. The gestational age is more accurate in early pregnancy and less likely to be off in the first trimester. ...Read more

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By the time a woman tests positive on a pregnancy test, is it safe to say that the gestational age at that time is approx 3-4 weeks?

By the time a woman tests positive on a pregnancy test, is it safe to say that the gestational age at that time is approx 3-4 weeks?

Yes: A blood pregnancy test usually turns positive just after 7 days after conception. This would be the 3rd gestational week. ...Read more

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If last LMP is not known would a ultrasound measure sac in early pregnancy to match gestational age?

If last LMP is not known would a ultrasound measure sac in early pregnancy to match gestational age?

Yes: An early transvaginal ultrasound can accurately estimate the gestational age within a couple of days. In the first trimester, there is very little biologic variation in size. If the embryo is present, the "crown-rump length" is routinely measured and used to determine the gestational age. Also, the mean diameter of the gestational sac gives a reasonable estimate of age. ...Read more

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What individual fetal measurement holds accuracy (represents true gestational age) longest in pregnancy (fl, ac, bpd, hc)?

What individual fetal measurement holds accuracy (represents true gestational age) longest in pregnancy (fl, ac, bpd, hc)?

Must use averages: I don't believe that any single measurement is most accurate throughout pregnancy. It is usually the averages that are taken. The most accurate measurements are actually in the first trimester in the way of the crown rump length in terms of predicting the estimated date of delivery. ...Read more

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Can sperm live longer than a week inside a woman? Also can pregnancy ultrasounds be off by a whole 2 months for calculating gestational age?

Can sperm live longer than a week inside a woman? Also can pregnancy ultrasounds be off by a whole 2 months for calculating gestational age?

Here are some. ..: Available info confirmed sperms inside genital tract may survive up to 5 days inside female genital tract. So, do HPT in a wk after missing period & repeat it in a wk if the 1st test is (-) & still in doubt. As to gestational age, ask your ob-gyn doctor who would most be qualified to answer your individual question since she/he know more about you than anyone online. Best wish. .. ...Read more

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Placenta is fundal grade 2. Gestational age 35 weeks. Is this right for this stage of pregnancy?

Placenta is fundal grade 2. Gestational age 35 weeks. Is this right for this stage of pregnancy?

Staging: Grade 2 means some early aging of the placenta, which is more common in women with hypertension and especially with smoking in pregnancy. It is also more common in advanced maternal age. If concerned, talk to your OB about NSTs and maybe a 39 week induction. If you're a smoker, stop ASAP ...Read more

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Can the first 2 ultrasounds of pregnancy taken a month apart with the same accuracy of gestational age in the second trimester be off by +- 25 days?

Can the first 2 ultrasounds of pregnancy taken a month apart with the same accuracy of gestational age in the second trimester be off by +- 25 days?

Ultrasound: The earlier an ultrasound is done the more accurate it is. The due date should never be changed to the date received on a later ultrasound. ...Read more

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When 1st trimester ultrasounds date pregnancy how do they base the gestational age? Do they assume conception occured on cd14?

When 1st trimester ultrasounds date pregnancy how do they base the gestational age? Do they assume conception occured on cd14?

US: First trimester ultrasound is based on biometric measurements only, the embryonic crown-rump length, which is extremely reliable when done by a skilled sonographer. No assumptiosn need be made at all. The ega is however reported correctly, by convention, from the first day of a hypotehtical last menstrual period; so in that regard it 'assumes' conception on cd 14. ...Read more

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What is a normal cervical length at 33 weeks of pregnancy? What should the bpd, ac, hc, fl of fetus be at this gestational age?

Cervix length: Should be more than 2.5 cm, as far as the rest your OB should be able to go over all of that with you as there is a range of normal. ...Read more

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I'm perfectly sure I'm 4w2d pregnant (gestational age). My hCG level is 690. Is it too high? Could it be twin pregnancy?

I'm perfectly sure I'm 4w2d pregnant (gestational age). My hCG level is 690. Is it too high? Could it be twin pregnancy?

HCG: Twins are always possible. The HCG number may be inaccurate in terms of dating. The best way to be sure, or to diagnose twinning is to have an ultrasound. ...Read more

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The crl & mean sac diameter measured during 7th wk of pregnancy gives fetal age:age from conception/implantation or the gestational age:age from lmp?

The crl & mean sac diameter measured during 7th wk of pregnancy gives fetal age:age from conception/implantation or the gestational age:age from lmp?

Lmp: All pregnancy dating is based on lmp. So even when LMP is unknown the age given by crl assumes when LMP "should have been. Ie about two weeks prior to implantation. So a pregnancy is 40 weeks from LMP and 38 weeks from implantation. All studies, all research, all dating, dating by ultrasound goes by the 40 week designation or from time of lmp. ...Read more

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When calculating the gestational age in IVF pregnancy, should we calculate from LMP or from day of embryo transfer?

When calculating the gestational age in IVF pregnancy, should we calculate from LMP or from day of embryo transfer?

Neither: The transferred embryo is already developed to a certain stage which your IVF facility can tell you. Your LMP is very inexact and is just a guideline in non-IVF pregnancies.
the date of conception is actually around day 14 of your cycle in a natural cycle and prior to the date of transfer in IVF. ...Read more

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I am 29 & this my 2nd pregnancy. The first one was ectopic. The sonographic report says anteverted uterus bulky. Gestational age 4.5 weeks. Worry?

I am 29 & this my 2nd pregnancy. The first one was ectopic. The sonographic report says anteverted uterus bulky. Gestational age 4.5 weeks. Worry?

Diagnosing ectopic: That ultrasound report is not very helpful. It's usually impossible to see a gestational sac at 4.5 weeks. Making the diagnosis of ectopic may require serial blood tests to watch the HCG hormone levels rise, and repeat ultrasounds. As a guideline, when your HCG level reaches about 1200, you should be able to see a tiny gestational sac in the uterus. Good luck! ...Read more

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Does a yolk sac rule out complete molar pregnancy? I've read that a CMP was once ruled "early gestational age" on ultrasound. Is this a typical mistake or does a yolk sac and 4 mm fetal pole generally rule out CMP?

Does a yolk sac rule out complete molar pregnancy? I've read that a CMP was once ruled "early gestational age" on ultrasound. Is this a typical mistake or does a yolk sac and 4 mm fetal pole generally rule out CMP?

Almost: It obviously depends on the resolution of the ultrasound, the skill/experience of the doctor/sonographer, and the gestational age for accuracy - but unequivocal findings of fetal pole and yolk sac should rule out mole 99%. Mole is usually first suspected with vaginal bleeding and unusually high hCG, not ultrasound. ...Read more

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My age is 34 have4kids had normal bloodpressure throughout and through pregnancy but now blood p is140/80.Is it normal BP. How to normal it.

My age is 34 have4kids had normal bloodpressure throughout and through pregnancy but now blood p is140/80.Is it normal BP. How to normal it.

Normal: It is in the range of normal. Elevated is usually defined as greater than 135/85. However, if this is a significant change for you, you may need to evaluate any changes in life style, diet, exercise, wt gain. ...Read more

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Is pregnancy ok at age 44 with asthma?

Is pregnancy ok at age 44 with asthma?

Pregnancy and asthma: As long as asthma is well controlled, there is no problem with being pregnant. Age is a different risk factor that needs to be assessed by your obstetrician. See a pulmonologist or allergist to keep asthma in check during the pregnancy. ...Read more

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Is anti aging cream safe during pregnancy?

Is anti aging cream safe during pregnancy?

Check c/ ingredient: Check each of the ingredients. Retin a (tretinoin) is category c. Hyaluronic acid is unknown. ...Read more

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Can you tell me about pregnancy and advanced maternal age at 35?

Can you tell me about pregnancy and advanced maternal age at 35?

AMA - age >35: Advanced maternal age (AMA) refers to women who get pregnant and give birth at the age of 35 or elder. AMA has been associated with certain adverse maternal and perinatal outcomes. At age 35 or greater, you have a higher risk of having a fetus with a chromosome anomaly (i.e. Down Syndrome). There is also an increased risk of pregnancy complications such as gestational diabetes, and preeclampsia. ...Read more

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How much should be the baby's heartbeat in the age of 10 weeks pregnancy?

FIRST TRIMESTER: Baby is not well formed yet at that age but the OB doctor certainly can hear it with a special stethoscope usually between 140 to 160 per minute? ...Read more

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At what age can I stop feeling guilty about taking DES in pregnancy decades ago?

At what age can I stop feeling guilty about taking DES in pregnancy decades ago?

Now: There is no eason for you to feel guilty. It was not your "fault" you took the medication. It was thought to have a eneficial efect in poreventing preterm deliveries of babies. While it probably did not work and caused a rare side effect in the cervix of children of mothers who were exposed. You had no reason to know there was a problem. So stop feeling guilty today! ...Read more

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Is there any relationship between the age of the woman at pregnancy and the i.Q. Of the resultant children?

Is there any relationship between the age of the woman at pregnancy and the i.Q. Of the resultant children?

Smart children...: ...Are born to smart women who make smart choices. Smart choices usually include effective birth control until ready to have a family. So in that way, yes, some relationship exists. ...Read more

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Should I have an IUD inserted at age 47? risks involved? Odds of pregnancy at my age? Don't want more children. Thanks

Should I have an IUD inserted at age 47? risks involved? Odds of pregnancy at my age? Don't want more children. Thanks

Safe: An IUD is a safe and very effective form of birth control at any age. Yes, your chances for getting pregnant at your age are significantly reduced, but is it worth the risk. If you are worried about pregnancy, use birth control. ...Read more