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Childbirth/PLEASE HELP CALCULATE CONCEPTION DATE?

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Expert: - 9/24/2008


Question
I HAD AN ULTRA SOUND DONE ON SEPT 3,2008 AND DOC SAID I WAS 6 WEEKS 4 DAYS. HAD ANOTHER TODAY(SEPT 23)AND WAS TOLD 9 WEEKS 6 DAYS.  QUESTION IS MY LMP WAS ON JULY 13 BUT ONLY FOR ONE DAY AND WAS TOLD IT MAY NOT HAVE BEEN A PERIOD AT ALL.  HOW CAN I CALCULATE CONCEPTION DATE BASED ON THIS INFO? I'M REALLY CONCERNED AND WOULD GREATLY APPRECIATE ANY INFORMATION.

Answer
Carol,

Based on both ultrasound dates, you most likely conceived around 7-30 to 8-2.  The ultrasound measurements vary by about 2 days, which is within a normal range of error.


So, it's possible that you didn't really have a period in July, but conception did occur around the time frame I gave regardless.  



Best,
Catherine

Childbirth

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Catherine Beier MS CBE

Expertise

I can provide evidence-based information and current research findings concerning childbirth and pregnancy. My specializations include natural childbirth, pregnancy and birth interventions, fetal positioning, labor induction, choosing a care provider, midwives, homebirth, unassisted birth, natural pain relief, medications in pregnancy and birth, informed consent, understanding the risks and benefits of childbirth choices, doulas, waterbirth, childbirth methods, childbirth education classes, cesarean section, and VBAC.

Experience

I have been a childbirth educator, mother, author, public speaker, researcher, and birth advocate for the past 9 years. I am also the author of Giving Birth Naturally, a site dedicated to natural childbirth and pregnancy information. I publish evidence-based articles on pregnancy, childbirth, newborn care, and post-partum care. I'm also a mother of three children, two daughters and one son all born naturally. To learn more about what normal birth looks like, view the natural childbirth video of my son being born at home unassisted.

Publications
My book, Birth Outside the Box, was published in 2007.

Education/Credentials
I hold a Master's degree in communication disorders with an emphasis in child development. I am also an independent childbirth educator.

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