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Late ovulation? CD30

Sorry in advance for the long post!

I am currently pregnant with my first baby and just looking to clear up a few things regarding my conception date as its been driving me bonkers - worried about ending up getting induced late if these dates are wrong!

Basically I have very long & irregular cycles. My cycle before falling pregnant was 1st May - 30th June 2017 (60ish days).

I then had my period on 30th June and this lasted 5 days. I had sex on 6th July and 29th July (or there abouts). I took a pregnancy test on 12th August which came back negative but then did another test 1wk later on 19th Aug which came back positive (showing 2-3weeks since conception so doctors would date this as 4-5 weeks gestation).

At my booking appt my midwife originally gave me a due date of 07/04/18 based on last period (even though my cycles are never 28 days so surely unlikely I would have ovulated so close to finishing my period!).

On 21st Sept my ultrasound dated me at 9w5d with an estimated due date of 21/4/18. Further ultrasound on 12th Oct dated me at 12w5 both have added up perfectly to my clear blue test on 19th Aug. However this means that I conceived 4 weeks after LMP - this could be because of my irregular periods?

Is there ANY possibilty that this baby could have been conceived from sex on 6th july? Or am I safe to assume that 29th is when bubba was conceived? The 2nd test I took (19th aug) was exactly 21 days after sex on 29th July.

These days would assume this would have been a 42/43 day cycle and would then make sense that I ov’d on CD30! Could this be correct? Just not sure how accurate the ultrasound dates are and if it could be off by this amount?

Thanks in advance
2 Responses
5536886 tn?1455827346
Ultrasounds could be wrong, however- the earlier you get them the more accurate they are- it's totally possible to conceive 4 weeks after your period, especially if you had an irregular cycle.  Not all women ovulate at exactly 14 days after their period- it's the most common, but it's totally possible to ovulate later.  Go with the due date your midwife has given you, they will watch for issues as you get closer to your due date and more likely then not, your body will take care of going into labor when it's the right time.  Congratulations!  
973741 tn?1342342773
People do have really long cycles, hon.  I did for a good long while where I would ovulate every 30 to 40 days and even longer in between.  It happens.  Come back and tell us what your doctor says.  Yes, congratulations. I want to hear how things are going!!
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