How would i determine due date as last period was August, only had sex 6 weeks ago?

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• AL_TwinCities member

  November 2015 Answer ✓

  If you know when you ovulated, you can add 9 months to the date you ovulated, and subtract one week. This is the method suggested in the book Taking Charge of Your Fertility.

  me 30; DH 35
  TTC since May 2014.
  Aug 2014 BFP, EDD April 22, 2015. Low progesterone, started suppositories. Loss at 5w6d.
  Nov 19, 2015 BFP at 13 dpo, EDD July 29, 2016. MMC discovered 12/29 (9+4). Natural miscarriage 1/16 (12+1).
  AMH results 0.42, 1.2; FSH 12.1, AFC 10, dx DOR. 
  RPL testing results normal. Nurse recommended progesterone suppositories in TWW.
  Clomid + trigger + TI cycle August 2016 - failed. Thin lining.
  Femara + trigger + TI cycle December 2016 - failed. Thin lining.
  Short LP (8 days).
  Acupuncture & Chinese herbs starting January 2017, lengthened LP to 10 days 
  
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• NHKx2 member

  November 2015 Answer ✓

  I had to wait until my first scan to get a realistic due date based on the baby's size. I had a Mirena for 8 years and my periods had completely stopped; once it was removed, I had one period then became pregnant. One period over an 8 year span was certainly not enough to base due date off of LMP! You can probably make a rough guess now, but your first scan will likely give a better indication when they can measure baby's growth.

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• goldie987 member

  November 2015 Answer ✓

  If you had sex only once and it was 6 weeks ago, you can assume you ovulated within 5-6 days of that particular day. Many online due date calculators allow you to enter an ovulation date, anywhere in that 5 day window after sex will give you a decent estimate of due date. At your first appt, see if they'll do a dating ultrasound, early pregnancy has very standard sizes for the embryo, to the point that a simple measurement can guess the due date within a few days of expected.

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• lionstigersbears member

  November 2015 edited November 2015 Answer ✓

  Sgoldberg247 said:

  If you had sex only once and it was 6 weeks ago, you can assume you ovulated within 5-6 days of that particular day. Many online due date calculators allow you to enter an ovulation date, anywhere in that 5 day window after sex will give you a decent estimate of due date. At your first appt, see if they'll do a dating ultrasound, early pregnancy has very standard sizes for the embryo, to the point that a simple measurement can guess the due date within a few days of expected.

  This would put you at about July 3rd-July 9th @jadelauren96 so about 8-9 weeks. It's standard practice to do a dating ultrasound in situations like yours, so I'd confirm that with your midwife office.

  Me 27 | DH 28

  DS October 2014

  #2 May 2016

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