Conception and Ultrasound -- Unplanned Pregnancy Advice Board

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Subject:

Conception and Ultrasound

Author:
Brandi (Scared and Confused)

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Date Posted: 06/20/07 10:09am

Hi I read about the help you provided via internet. I am writing you this email to see if you can shed some light to my situation. I will start from the beginning so you have the full details of the situation. In DECEMBER of 2006, my fianc� and I broke up after 6 years. Okay, well on DECEMBER 20TH, I had sexual relations with someone else which the �pull out� method was used. I was very scared and ashamed so I went to plan parenthood and took Plan B. On January 7th,2007 I had a menstrual period that was shorter and lighter then normal. HOWEVER, I do have irregular periods. Well at the beginning of February I noticed that my breast were enlarging (to me) and then I experienced some light brown spotting for 1 day. Well I was cramping and cramping but never started my period so on February 25th, I took a pregnancy test that came back positive. I immediately scheduled a Dr�s appointment for the next day because I feared I may be having a miscarriage. I had an ultrasound done that dated me at 7 weeks 3 days pregnant. My questions are: 1) Could the Plan B that I took, have effected my menstrual I had on 1/7/07. 2) How accurate are first trimester ultrasounds? 3) What are the possibilities it could be the other mans. 4) when would conception have occurred? I am very scared as to who the father is. In order for it to be the other guys, the ultrasound would have to be off by 4 weeks. And I didn�t experience any pregnancy symptoms in the month of January. Please help me ease my mind, I would GREATLY appreciate it!

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Replies:

[> Subject: Re: Conception and Ultrasound

Author:
Pat
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Date Posted: 06/21/07 12:02am

Hi, Brandi,

You are mostly asking medical questions, and we're not doctors! I don't know the answers to your questions. First trimester ultrasounds are probably not all that accurate because the baby is still pretty small. I wouldn't bet the farm on an ultrasound telling me the correct age at any stage, to be honest. At 7 weeks, your baby's body is complete, just very small.

It's June already. With whom did you have sex in April? If you are 7 weeks, that's when it would have happened.

Plan B wouldn't do your body any good. It's like using an atom bomb to hit an ant. Our bodies' hormones are delicately balanced. So that could easily have thrown a lot of things out of whack, and makes it hard to determine what is really happening with your body.

I am betting you have other issues on your mind. Feel free to let us know what else concerns you.

Hugs,
Pat

[> Subject:

Re: Conception and Ultrasound

Author:
Melanie
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Date Posted: 06/21/07 3:16am

Actually, the earlier ultrasounds are more accurate for dating than later ones. Plan B is basically a high dose of an oral contraceptive, and that can definitely affect your periods. At 7 weeks, I seriously doubt your dating will be 4 weeks off. It's usually within 1-2 weeks of the date.

Here is a link on ultrasounds if you want to read more:
http://www.ob-ultrasound.net/

If you have any questions or concerns about the dating and timing, it would be good to discuss this with your doctor, But if your ultrasound was done at 7 weeks, and it was 4 weeks off (as in 3 weeks) they would not have seen the embryo on ultrasound most likely.

Does your bf know about the other guy at all? Is that why you are so concerned?

[> Subject: Re: Conception and Ultrasound
Author: luka [ Edit \| View ]	Date Posted: 06/21/07 5:26pm I agree with Mel Early ultrasounds are much more accurate than later ones. In my experience of pregnancy and i have had 5 children. They were usually acurate within 4 days on the two occasions where i have actually known the date of conception.

[> Subject: Re: Conception and Ultrasound
Author: Shellie [ Edit \| View ]	Date Posted: 06/22/07 3:19pm Hi Brandi, I too, agree with Melanie; early ultrasounds are pretty accurate as far as dating the pregnancy. They are usually off by only a few days if done early. As the pregnancy progresses, dating becomes less accurate and can then be off by weeks, not days. Take care, Shellie