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Information on fetal growth - Online Doctor Chats

Date : 21-Feb-2012
User rating for this question
Excellent Posted in: Early Pregnancy Signs and Symptoms
Answered by

General & Family Physician
Practicing since : 2005
Answered : 2408 Questions
User :   Hi,
my last period was aug 6th 2010, i did not see my period in september i took a home preg test on sept 28th it was negative i did another on oct 13th it was positive i did an ultrasound with the probe on oct 15th they said i was 5 weeks 3 days ...i did another on oct 21st a normal u/s on the stomach no probe and got a fetal heart rate of 149.25 bpm they said i was 6 weeks my question is would i have conceived on sept 28th and should the fetal HR be so fast at 6 weeks 1 day? i personally think i further along the first 2 u/s were done in Trinidad and i had another on Nov 11th in the US they said i was 9 weeks i am trying to figure out when i would have conceived thanks in advance....
Doctor :   Hi
User :   hello
Doctor :   let me read ur query
User :   ok
Doctor :   please give me a few minutes
Doctor :   so according to your USG Done - ....
Doctor :   Nov 11th - it says 9 weeks
User :   yes
User :   gestational age 9 weeks - 7 weeks from conception
Doctor :   and october 15th - it was 5 weeks
Doctor :   and oct 21st it was 6 weeks
User :   yes thats what they said
User :   yes it all seem to be corresponding
Doctor :   most of these reading are correct as they calculat based on the no of weeks are corresponding exactly
Doctor :   but ur query is whats the date of ur conception , is this right ?
User :   do you think i would have conceived in the 28th ...yes
Doctor :   give me a few minutes to calculate ur date of conception .
User :   my boobs were sore like crazy since the 20th and stuff
User :   and would they have gotten such a fast heart rate at 6 weeks without doing a transvaginal u/s ? the doc i saw on nov 111th said it would have been more advanced if that was the case so i am slightly confused ...
Doctor :   your conception was on august 20th
User :   i figured that makes sense
Doctor :   this is based on your last LMP of aug 6th
User :   so i would be more than 9 weeks ..but the u/s says differently it possible to get pregnant in sept if i did not see my period?
Doctor :   as the fetus is young, the heart rate can vary and can be high
User :   ok but there is no way i would have conceived on sept 28th right?
Doctor :   Your ultrasound is correct , as if conception occured on aug 20th, then, on october 15th, u will be 7-8 weeks pregnant
Doctor :   NO
Doctor :   u cannot have concieved on sept 28th
User :   but they said on oct 15th i was 5 weeks 3 days i conceived 3 weeks ago ...see how this is confusing
Doctor :   ultrasound techniques can depend on the doctor doing it
User :   and based on what i have read that the beg of the 8th week the heart rate starts at 149 bpm .... and it was 149 on oct 21st which would have been the 8th week
User :   cause my tummy started to show a bit all that time my boyfriend is very short so maybe the baby is extra small...
Doctor :   no , it cannot be
Doctor :   yes its right that on october 21st, u will have completed 8 weeks
Doctor :   usually USG have a sensitivity of + or -- 1 WEEKS
User :   ok well i just wanted to make sure the 28th date is out of the picture ...and thanks for clearing this up....
Doctor :   yes , sept 28th is not the date of ur conception
Doctor :   this is 100 % sure
User :   u have no idea how worried i was about this i broke up with my b/f and started see my ex then his dad died and we got back together thats why i was in trinidad and he has been trying to get me pregnant forever i am 29yrs and this is my first
Doctor :   ok
Doctor :   i understand
Doctor :   but u can rest assured now
User :   i only slep with my ex in the night of the 27th sept ... it was after 12 am so thats why i say the 28th ...and the doc i saw on nov 11th said it could be a possibility he may be the dad so i got really scared
Doctor :   the chances are less , as u had not got ur period in september
User :   i thought about aborting and stuff but i would hate to i wont be able to live with myself if i did u know
Doctor :   and most of the USG are more or less correct
Doctor :   I do understand your situation
User :   ok well thanks again ... hope i have a healthy baby and not a stress ball
Doctor :   u r welcome
Doctor :   and may ur wish come true
Doctor :   congrats on your becomeing a mother soon
User :   thanks again...i have a sonogram tomm with bloodwork so maybe i'll get soem more info....thanks a mill
Doctor :   u r welcome

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