PREGNANCY-BIRTH Messages for November, 2001: Re: Curious about Conception Date versus U/S

Re: Curious about Conception Date versus U/S

From: R. Daniel Braun, MD (anonymous@obgyn.net)
Fri, 30 Nov 2001 07:31:04 -0600 (CST)

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At Thu, 29 Nov 2001, anonymous wrote: >
>At Thu, 29 Nov 2001, R. Daniel Braun, MD wrote:
>>
>>At Thu, 29 Nov 2001, anonymous wrote:
>>>
>>>O.k., here are the facts: LMP - Started late evening Oct. 3
>>> Unprotected sex Oct. 13, 14, 21 & 22
>>> Sex using (early) withdrawal Oct. 18 & 20
>>> Took HPT Nov. 3 - negative
>>> Took HPT Nov. 6 - positive
>>> Had U/S Nov. 26, they dated 7.4 weeks
>>> The intake nurse used a dial and told me
>>> Oct.18 was our most probable conception date.
>>> She said the early U/S almost guarantees it!
>>> I'm skeptical...what do you experts think?
>>> Thanks for indulging me, I'm very curious
>>> about our conception date. This a great site!
>>
>>If you are 7.4 weeks (Plus or minus 5 days)[that is all the more
>>accurate US is at this stage.], then conception (Egg meets sperm in the
>>fallopian tube) occurred 5.4 (Plus or minus 5 days) weeks ago. Whatever
>>date that was.
>>The episode of intercourse that deposited the LUCKY sperm could have
>>been as much as 5-7 days prior to that or as little as 6 hours prior to
>>that.
>>So which day was it ????
>
>Thank you so much for your reply, Dr. Braun, but please indulge...
>5.4 weeks before my U/S was Oct. 18...the date the intake nurse came up
>with on the sliding dial. So...my question is...my husband withdrew in
>plenty of time that evening of Oct. 18th...do you think it is still most
>probable that I conceived from that session? Or, that Oct. 13, 14, 21
>or
>22 are more probable because we used no form of contraception? Thanks
>again!>
>>
>>--
>>R. Daniel Braun, MD FACOG FOG
>>
>>This is for educational purposes only, and is not intended to be replacement or substitute for consultation and examination by an appropriate medical professional. Due to time constraints, private e-mails cannot be answered.
>>

No way to tell. Withdrawal has the highest failure rate of all forms of contraception. It is around 70%. That means that of 100 couples who use withdrawal 70% will be pregnant within a year. No contraception at all is 85%

--
R.Daniel Braun, MD  FACOG   FOG
**Note:  Opinions expressed here are for educational purposes only
and, as such, do not constitute a physician-patient relationship.
This information is not intended to supplant the need for you to
consult with your physician prior to choosing therapeutic options
and/or interventions.

**Private emails cannot be entertained due to time constraints,
consequently no private emails will receive a response.

**Thank you for your understanding ;-)

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