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How To Calculate The Gestational Age Of Foetus?

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Posted on Wed, 28 Jan 2015
Question: Hi I missed my periods on 7th of January. Please tell me how much old my fetus will be now and when to go for first scan? My cycle is of 30 days and my last periods started on 7 Dec 2014
doctor
Answered by Dr. Sameer Kumar (25 minutes later)
Brief Answer:
you are 5 weeks +5 days , if pregnant

Detailed Answer:
Hello,
Thanks for consulting HCM
Firstly you have to confirm pregnancy with a urine pregnancy test. if its positive then fetus would be 5 weeks + 5 days , and you can go for the dating scan next week between 6-7 weeks to confirm the heart beat and intrauterine pregnancy,
regards
Above answer was peer-reviewed by : Dr. Chakravarthy Mazumdar
doctor
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Follow up: Dr. Sameer Kumar (8 minutes later)
I have already done the urine test for pregnancy and its positive . However I have concern with calculation of weeks for fetus. In the month of December we had intercourse only once on 20 th dec after I used ovulation kit to know the date when exactly to have intercourse to conceive so accordingly fetus should be around 3 weeks
doctor
Answered by Dr. Sameer Kumar (4 minutes later)
Brief Answer:
gestation is calculated from lmp only

Detailed Answer:
For all practical reasons the gestational age is calculated from the last menstrual period and not the dae of conception.
ultrasound would be sur between 6 to 7 weeks from the dae of lmp.
regards
Above answer was peer-reviewed by : Dr. Chakravarthy Mazumdar
doctor
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Follow up: Dr. Sameer Kumar (31 minutes later)
Thank you for reply. Please tell is it ok to travel on bike for initial 3 months as we travel by Bike to office
doctor
Answered by Dr. Sameer Kumar (27 minutes later)
Brief Answer:
please dont travel by bike till 12 weeks

Detailed Answer:
hello,
It is not advisable to travel by bike in the first trimester as the unwanted jerks during the travel may initiate a bleeding which can be completely avoided. So it is advisable to use a better form of commuting, a taxi or a auto rickshaw and drive slow.
regards
Note: Revert back with your gynae reports to get a clear medical analysis by our expert Gynecologic Oncologist. Click here.

Above answer was peer-reviewed by : Dr. Chakravarthy Mazumdar
doctor
Answered by
Dr.
Dr. Sameer Kumar

OB and GYN Specialist

Practicing since :2002

Answered : 1782 Questions

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How To Calculate The Gestational Age Of Foetus?

Brief Answer: you are 5 weeks +5 days , if pregnant Detailed Answer: Hello, Thanks for consulting HCM Firstly you have to confirm pregnancy with a urine pregnancy test. if its positive then fetus would be 5 weeks + 5 days , and you can go for the dating scan next week between 6-7 weeks to confirm the heart beat and intrauterine pregnancy, regards