WOMENS-HEALTH Messages for March, 1999: Re: about menstrual cycle and pregnancy

Re: about menstrual cycle and pregnancy

From: Harvey S. Marchbein, M.D. (anonymous@obgyn.net)
Mon, 29 Mar 1999 10:18:04 -0600 (CST)

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In reply to: xin: "about menstrual cycle and pregnancy"

At Sun, 28 Mar 1999, xin wrote: >
>Dear Doctor:
>
>I am just wondering if the menstrual cycle is referred to the interval
>between the two beginnings of the adjacent two periods?

Yes.

>Also I wonder to
>know when is the most possible time for pregnancy after unprotected
>intercourse. I knew it's in the midway between two menstrual cycles but
>I don't know if it is calculated from the beginning of one periods of
>after that.

According to a study done a couple of years ago, pregnancy may occur up to 5 days prior to ovulation and the day of ovulation, but no pregnancies occurred the day after ovulation. This was a surprise in that it was believed to be different timing previously.

Now, ovulation is usually on the day 14 days before the next period. For example - day 14 on a 28 day cycle (28-) but on a 35 day cycle, ovulation is approximately day 21, give or take a day (35-14!).

--
Harvey S. Marchbein, M.D. FACOG, FACS
Great Neck, New York
http://www.obgyn.net/states/bios/marchbein.htm
http://www.obgyn.net/women/advisors/harveym.htm

**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 ;-)

Next message: Carolyn: "Dr Harvey"
Previous message: Harvey S. Marchbein, M.D.: "Re: normal flora"
In reply to: xin: "about menstrual cycle and pregnancy"

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