[Rohitklp]

My lmp was 14/5. Hpt came out positive with faint line on 18/6 and 20/6.went for my first ultrasound on 11/7 (supposed that 8 weeks around as per lmp)but u/s result states gestational age of 4 week 3 days.with gestational sac diameter as 13.4 mm nothing else.
I have history of irregular periods and one missed abortion
Please advise if the gestational age advised coresponding to the sac is correct

[smoothy]

You should have been asking your OB/GYN these questions.

If you are concerned about when the pregnancy occurred because more than on man can bee the father. You will have to get a DNA test done as these other means of determining conception dates are only guesses and can be off as much as two weeks in either direction. Meaning a possible 4 week window when it occurred.

[ScottGem]

Any calculation of gestational age or conception dates is educated guesswork. This means it can be +/- 2 weeks or maybe more.

The only reason I see that this should be of major concern is if there is a question of paternity. Anyone who inserted their penis after May 14 is a potential father. The only way to be sure is with DNA testing after birth.

[DoulaLC]

With just gestational sac measurement, and nothing else seen (yolk sac or fetal pole) it could put you roughly 4-5 weeks fertilizational, or fetal age. While your period may have been 8 weeks ago, it is possible you ovulated a bit later than the average, which would account for the difference and what was seen.

A scan that early doesn't tell you a great deal as what can be seen can change in just days. It can also depend on the experience of who is looking at the results.You will have a better idea how the pregnancy is progressing, and if there would be any concern, with another scan in just 2 to 3 weeks. You'll also learn if the estimated dating is consistent with what would be expected from the first scan. Do you have another scan scheduled?