Study On Determining Gender By Ultrasound... Posted: 02-13-04 00:05am
Ultrasound: accurate for determining
baby's sex?
There is a disparity in the age and
quality of some of the ultrasound
equipment, as well as a difference in the
experience level of technicians, which
makes it difficult to accurately state one
gestational age at which ultrasound can
always detect fetal gender. Some of the
reports in the literature are misleading
because they use study protocols, which
make use of the best and latest devices.
Even though studies are now reporting 100
percent accuracy in determining fetal
gender between 11 to 16 weeks of
gestation, in the average clinic
situation, fetal gender identification is
often not undertaken until at least 16
weeks, and is often not reliable until 20
to 24 weeks -- and this is when the baby
cooperates fully!
In a study by whitlow, published in
ultrasound in obstetrics & gynecology,
a sample of 524 women underwent a detailed
assessment of fetal anatomy at 11 to 14
weeks of gestation by means of
transabdominal sonography and transvaginal
sonography (26 percent). Fetal gender was
identified and was confirmed at birth.
The overall success of correctly assigning
fetal gender increased with gestational
age. At 11 weeks predictions were correct
46 percent of the time, at 12 weeks 75
percent, at 13 weeks 79 percent and at 14
weeks a 90 percent success rate was
reached.
An article by efrat in the same volume
(ultrasound in obstetrics &
gynecology,may 1999,) assessed the
accuracy of fetal sex determination at 11
to 14 weeks of gestation in 172 singleton
pregnancies. The accuracy of sex
determination increased with gestation
from 70 percent at 11 weeks, to over 98
percent at 12 weeks and 100 percent at 13
weeks. Male fetuses were wrongly assigned
as female in 56 percent of cases at 11
weeks, 3 percent at 12 weeks and 0 percent
at 13 weeks. In contrast, only 5 percent
of the female fetuses at 11 weeks were
incorrectly assigned as male and this
false-positive rate was 0 percent at 12
and 13 weeks.
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insurancegirl
Especially EHEALTHy
Joined: 25 Sep 2003 Posts: 5286
Posted: 02-13-04 10:19am
Last edited by insurancegirl on 10-07-04 10:14am; edited 1 time in total
My mom had 4 kids. 3/4 were right. My
brother was a "girl" according to the
docs...... But he came out a boy
obviously. Lol
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insurancegirl
Especially EHEALTHy
Joined: 25 Sep 2003 Posts: 5286
Posted: 02-13-04 12:36pm
Last edited by insurancegirl on 10-07-04 10:15am; edited 1 time in total
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JillMarie
Extremely EHEALTHy
Joined: 24 Dec 2003 Posts: 3022 Location: Iowa
Posted: 02-18-04 18:38pm
Bringing up for ansley2004
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Ansleyt2004
Experienced User , Rather EHEALTHy
Joined: 15 Dec 2003 Posts: 355 Location: MS
Posted: 02-18-04 18:45pm
Great!! Im gonna ask and see if he will
try when I got back since ill be 14 maybe
he will!! I sure hope so im sooooo
anxious to know what im having!!
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KariM18
Extremely EHEALTHy
Joined: 13 Jan 2004 Posts: 1436 Location: Grand Blanc, Michigan
Posted: 02-18-04 21:44pm
Well thats good to know, I at least feel a
little more confident that they got it
right (they said its a boy) but I still
reccomend just as the doctors do, to wait
until after 18 weeks.. I think 20 weeks
is best. They did mine at 16 weeks n 6
days and it wasnt clear enough and was
very difficult to know for sure so I still
wonder anyhow ! Im pretty sure it is a
boy tho like they said, but they docs say
they will do another at 20 weeks to be
100%. I am 18 weeks tomorrow* but it
makes sense that its a lot less when they
are wrong about a girl being a boy. .
Cuz nothin would be stickin out a ton on a
girl. . But it is easier for a boy to be
mistaken as a girl if its just hidden.
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Jaydensmommy
Advanced Support Team
Joined: 28 Jan 2004 Posts: 1684 Location: Wisconsin
Posted: 02-19-04 02:18am
I found out with jayden at exactly 20 wks.
I was told they often mistake a girl for
a boy because her vaginal area is often
swollen and can look like testicles. I
was scared to death she would come out a
boy. I didn't mind either way, I just
had alot of pink things!! Gosh I miss
bein preggy and having a newborn!!
Although I do not need another one quite
yet!
~sara~
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Ansleyt2004
Experienced User , Rather EHEALTHy
Joined: 15 Dec 2003 Posts: 355 Location: MS
Posted: 02-19-04 09:49am
What about if they did a 3d ultrasound?
Im just so anxious
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JillMarie
Extremely EHEALTHy
Joined: 24 Dec 2003 Posts: 3022 Location: Iowa
Posted: 02-19-04 11:36am
Do they had 3-d where your from? I think
it's easier to tell if it's 3 or 4-d
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