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Q about the yolk sac...how many weeks?

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June 29th, 2011, 05:27 AM
NewStar's Avatar Veteran
Join Date: Jun 2011
Posts: 194
Hi Ladies sorry ive bee MIA - currently moving right now !

I have my second ultrasound on Saturday , my first ultrasound was over 2 weeks ago and during the ultrasound we found that I had PCOS and my pregnancy was not as far along as according to my LMP.But she said that I have ovulated late due to the PCOS so she put me at 4-5 weeks.

We could see the sac and the yolk sac and a little dot which she said was the baby. Just wondering how far along I could have actually been at that point as 4wks sounds early to see the yolk sac etc??

So when does the yolk sac appear as I thought it was in your 5th week?

Im so impaitent just want to find out how far along I roughly am!

Sorry for the rambling on

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June 29th, 2011, 07:25 AM
daneeleigh's Avatar Platinum Supermommy
Join Date: Jan 2008
Location: San Diego, CA
Posts: 6,647
I wish I had some advice but I'm not sure. I know a sac "can" appear as early as four and a half weeks but I think you might need to be a little further along so they can really give you a good date.
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June 29th, 2011, 07:44 AM
Iluvmybabies*'s Avatar Mama to 5 girls and 1 boy
Join Date: Apr 2007
Location: Calgary, Alberta
Posts: 7,641
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I found this

By the 4th week, the yolk sac is fully functioning, but very small. It cannot be seen on transvaginal ultrasound until week 5. In early pregnancy, the gestational sac, yolk sac and fetal pole grow at nearly the same predictable rate for all pregnancies. Of course, there are factors which might not allow the yolk sac to be seen until a few days later. For example, we would see the yolk sac (or gestational sac or fetal pole) in a very thin woman earlier than we would see it in an obese woman. If the ultrasound beam must travel through more tissue to reach the area of interest, it would be harder to see.

"Between days 7-10 from fertilization implantation usually occurs. Implantation should occur within the uterus if it does not this is considered an ectopic pregnancy. The amniotic sac, umbilical cord and YOLK SAC are already beginning to form."
Matt(38)DH & soulmate for 15 1/2yrs (V-Feb 20/08 * VR-Feb 18/11)
6 time HG survivor , AP Mama to 5 GIRLS & a 1 BOY
Karrara 11 01/11/05, Kaiah 9 1/2 07/01/06, Kayda 8 01/12/08
Katara 4 02/10/12, Korra 2 1/2 10/10/13, Kannon 14mo 02/21/15
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June 29th, 2011, 07:48 AM
Platinum Supermommy
Join Date: Mar 2008
Posts: 6,602
I think your next ultrasound will be able to date the pregnancy pretty accurately.

Thank you GraysMama for my beautiful siggy!
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June 29th, 2011, 07:58 AM
Mega Super Mommy
Join Date: Nov 2008
Location: Ohio
Posts: 4,303
I think you have gotten some pretty great advice here already. Hopefully your next ultrasound will make things more clear.

Thank you so much Kris2you for my lovely siggy!!!

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